{"id":127997,"date":"2026-05-21T09:39:05","date_gmt":"2026-05-21T07:39:05","guid":{"rendered":"https:\/\/www.linseis.com\/unkategorisiert\/fep-fluoropolymer-thermal-properties-and-industrial-applications\/"},"modified":"2026-05-21T09:59:51","modified_gmt":"2026-05-21T07:59:51","slug":"fep-fluoropolymer-thermal-properties-and-industrial-applications","status":"publish","type":"post","link":"https:\/\/www.linseis.com\/en\/wiki\/fep-fluoropolymer-thermal-properties-and-industrial-applications\/","title":{"rendered":"FEP fluoropolymer: Thermal properties and industrial applications"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"127997\" class=\"elementor elementor-127997 elementor-127942\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b75441f e-flex e-con-boxed e-con e-parent\" data-id=\"b75441f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-35d541b e-con-full e-flex e-con e-child\" data-id=\"35d541b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-97683da elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"97683da\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h2&quot;],&quot;exclude_headings_by_selector&quot;:[],&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;marker_view&quot;:&quot;numbers&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tTable of contents\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__97683da\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__97683da\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__97683da\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d69a620 elementor-widget elementor-widget-spacer\" data-id=\"d69a620\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f563fb9 elementor-widget elementor-widget-text-editor\" data-id=\"f563fb9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>FEP (Fluorinated Ethylene Propylene Copolymer) combines low friction, excellent electrical insulation and high optical clarity in one material &#8211; a combination that predestines it for dynamic applications in which media flow, movement and signal transmission must be reliably controlled. [ <sup>1,2]<\/sup> The following text highlights the key structural and thermal properties of FEP and shows how these can be specifically characterized using thermal analysis methods &#8211; and corresponding solutions from Linseis.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2779a66 elementor-widget elementor-widget-spacer\" data-id=\"2779a66\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-70a90bd elementor-widget elementor-widget-heading\" data-id=\"70a90bd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Crystallinity and morphology<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-36f5a88 elementor-widget elementor-widget-spacer\" data-id=\"36f5a88\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-035f339 elementor-widget elementor-widget-text-editor\" data-id=\"035f339\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>FEP is a semi-crystalline fluoropolymer that is a copolymer of tetrafluoroethylene (TFE) and hexafluoropropylene (HFP). The HFP component interferes with <a href=\"https:\/\/www.linseis.com\/en\/wiki\/what-happens-during-crystallization-tc\/\"><strong>crystallization<\/strong><\/a> compared to pure <a href=\"https:\/\/www.linseis.com\/en\/wiki\/ptfe-as-a-high-performance-engineering-material-properties-applications-and-future-prospects\/\"><strong>PTFE<\/strong><\/a>which leads to a lower <a href=\"https:\/\/www.linseis.com\/en\/wiki\/phase-transition-of-a-substance-melting\/\"><strong>melting temperature<\/strong><\/a>moderate crystallinity and higher flexibility compared to PTFE. [ <sup>3]<\/sup> Crystallinity has a significant influence on stiffness, transparency and barrier properties: Higher crystalline content increases modulus and chemical resistance, but often comes at the expense of optical clarity. Studies on FEP blends show that melt peak position and melt enthalpy in <a href=\"https:\/\/www.linseis.com\/en\/methods\/differential-scanning-calorimetry\/\"><strong>DSC measurements<\/strong><\/a> remain largely constant, while crystallite size and distribution change with copolymer composition and thermal history. <sup>[3]<\/sup>  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ac9afd3 elementor-widget elementor-widget-spacer\" data-id=\"ac9afd3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\n\t\t\t<img class=\"e-image-base e-1883e7c-cc392f0\" \n\t\t\t\t\tdata-interaction-id=\"1883e7c\" \n\t\t \n\t\t data-e-type=\"widget\" data-id=\"1883e7c\" \n\t\t\t\t\t\t\t\t\tid=\"127992\"\n\t\t\t\t\t\t\t\t\t\t\t\tsrc=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2026\/05\/FEP-Crystallinity-and-Morphology.png\"\n\t\t\t\t\t\t\t\t\t\t\t\twidth=\"1536\"\n\t\t\t\t\t\t\t\t\t\t\t\theight=\"1024\"\n\t\t\t\t\t\t\t\t\t\t\t\tsrcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2026\/05\/FEP-Crystallinity-and-Morphology.png 1536w, https:\/\/www.linseis.com\/wp-content\/uploads\/2026\/05\/FEP-Crystallinity-and-Morphology-300x200.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2026\/05\/FEP-Crystallinity-and-Morphology-1024x683.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2026\/05\/FEP-Crystallinity-and-Morphology-768x512.png 768w\"\n\t\t\t\t\t\t\t\t\t\t\t\talt=\"Scientific illustration of the semi-crystalline morphology of FEP fluoropolymer showing crystalline and amorphous regions, flexible polymer chains, and structural differences compared to PTFE.\"\n\t\t\t\t\t\t\/>\n\t\t\t\t\t<div class=\"elementor-element elementor-element-72b4575 elementor-widget elementor-widget-spacer\" data-id=\"72b4575\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1b982d6 elementor-widget elementor-widget-heading\" data-id=\"1b982d6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Melting point and thermoplastic processability<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-92f5197 elementor-widget elementor-widget-spacer\" data-id=\"92f5197\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5df331d elementor-widget elementor-widget-text-editor\" data-id=\"5df331d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The melting point of FEP is typically in the range of 260-275 \u00b0C, well below that of PTFE, but high enough for many high-temperature applications. [ <sup>1,2]<\/sup> In DSC measurements, FEP grades usually show a sharp endothermic melting peak around 260-270 \u00b0C in the second heating curve, the area of which correlates directly with the degree of crystallinity. In practice, the relatively low melting point means good thermoplastic processability &#8211; extrusion, injection molding and film blowing &#8211; without significantly compromising the high temperature resistance in use. In dynamic systems, such as hoses, cable insulation or transparent films, this allows the production of thin-walled, complex-shaped components that can be operated under continuous loads of up to around 200 \u00b0C.    <sup>[1]<\/sup><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c348815 elementor-widget elementor-widget-spacer\" data-id=\"c348815\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-95aac46 elementor-widget elementor-widget-heading\" data-id=\"95aac46\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Wide range of variants: copolymers, blends and special grades<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6dd2e47 elementor-widget elementor-widget-spacer\" data-id=\"6dd2e47\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a18f69c elementor-widget elementor-widget-text-editor\" data-id=\"a18f69c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>FEP is itself a copolymer (TFE\/HFP), but is offered in a variety of grades: from highly transparent film and tubing grades to filler-modified compounds and FEP blends with high-performance thermoplastics such as PEEK or PEI. Studies on FEP\/<a href=\"https:\/\/www.linseis.com\/en\/wiki\/peek-polyetheretherketone-the-versatile-high-performance-plastic-for-extreme-requirements\/\"><strong>PEEK<\/strong><\/a>&#8211; and FEP\/PEI composites show that crystallinity, mechanical stiffness and thermal stability <a href=\"https:\/\/www.linseis.com\/en\/wiki\/measurement-of-thermal-stability\/\"><strong>thermal stability<\/strong><\/a> can be specifically shifted &#8211; for example to achieve higher application temperatures or better abrasion resistance. [ <sup>3]<\/sup> There are also special grades for optical applications (maximized transparency, narrow gel level), for high-frequency electronics (optimized dielectric losses) and for dynamic fluid systems (adapted flexibility and permeation). For the design of such variants, the combination of <a href=\"https:\/\/www.linseis.com\/en\/instruments\/differential-scanning-calorimeter-dsc\/\"><strong>DSC<\/strong><\/a> (melting\/crystallization behaviour), <a href=\"https:\/\/www.linseis.com\/en\/instruments\/tga-thermogravimetry\/\"><strong>TGA<\/strong><\/a> (thermal decomposition) and <a href=\"https:\/\/www.linseis.com\/en\/instruments\/thermal-analysis\/tma-thermomechanical-analysis\/\"><strong>TMA<\/strong><\/a>\/DMA (deformation under load) are key tools in development and quality assurance.  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3b379d1 elementor-widget elementor-widget-spacer\" data-id=\"3b379d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-603b8b4 elementor-widget elementor-widget-heading\" data-id=\"603b8b4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Chemical, UV and mechanical resistance<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2ed514a elementor-widget elementor-widget-spacer\" data-id=\"2ed514a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c372963 elementor-widget elementor-widget-text-editor\" data-id=\"c372963\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Chemically, FEP is almost completely inert to acids, alkalis and many organic solvents &#8211; a direct result of the strong C-F bonds and the dense fluorine shell of the polymer backbone. Concentrated mineral acids, alkalis and hydrocarbons do not attack FEP in the normal range of applications, which makes the polymer attractive for aggressive process environments and high-purity fluid systems. [ <sup>2,4]<\/sup> FEP also exhibits very high weather and UV resistance: even highly transparent grades largely retain their transmission under long-term sunlight for years. [ <sup>1]<\/sup> Mechanically, FEP combines relatively low stiffness, high elongation and pronounced flexural fatigue strength. Flexible tubes, cables and films can therefore be reliably operated in dynamic applications &#8211; for example in moving energy chains, catheters or moving sensor lines. The low surface energy and low coefficient of friction also reduce abrasion and adhesion.     <sup>[1,4]<\/sup><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c95d32d elementor-widget elementor-widget-spacer\" data-id=\"c95d32d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1632185 elementor-widget elementor-widget-heading\" data-id=\"1632185\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Thermal stability and application limits<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d6035da elementor-widget elementor-widget-spacer\" data-id=\"d6035da\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cc80029 elementor-widget elementor-widget-text-editor\" data-id=\"cc80029\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>TGA tests typically show that FEP begins to decompose in the range of 380-430 \u00b0C &#8211; well above the typical application temperatures. This enables continuous use from around -200 to +200 \u00b0C without significant loss of mass or structural degradation. [ <sup>1,3]<\/sup> In dynamic systems, such as hose packages in process engineering or cable insulation in power electronics, this thermal reserve allows thermal load peaks and cyclical temperature fluctuations to be safely absorbed. Using simultaneous TG-DSC analysis, melting, reorganization and decomposition can be clearly separated from each other and linked to mass-related enthalpies &#8211; essential for material approvals and fatigue strength analyses.  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c7225d7 elementor-widget elementor-widget-spacer\" data-id=\"c7225d7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\n\t\t\t<img class=\"e-image-base e-04f427c-617bc41\" \n\t\t\t\t\tdata-interaction-id=\"04f427c\" \n\t\t \n\t\t data-e-type=\"widget\" data-id=\"04f427c\" \n\t\t\t\t\t\t\t\t\tid=\"127993\"\n\t\t\t\t\t\t\t\t\t\t\t\tsrc=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2026\/05\/Thermal-Properties-of-FEP-DSC-and-TGA-Analysis.png\"\n\t\t\t\t\t\t\t\t\t\t\t\twidth=\"1536\"\n\t\t\t\t\t\t\t\t\t\t\t\theight=\"1024\"\n\t\t\t\t\t\t\t\t\t\t\t\tsrcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2026\/05\/Thermal-Properties-of-FEP-DSC-and-TGA-Analysis.png 1536w, https:\/\/www.linseis.com\/wp-content\/uploads\/2026\/05\/Thermal-Properties-of-FEP-DSC-and-TGA-Analysis-300x200.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2026\/05\/Thermal-Properties-of-FEP-DSC-and-TGA-Analysis-1024x683.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2026\/05\/Thermal-Properties-of-FEP-DSC-and-TGA-Analysis-768x512.png 768w\"\n\t\t\t\t\t\t\t\t\t\t\t\talt=\"Scientific infographic on the DSC and TGA analysis of the fluoropolymer FEP, including the melting behavior at about 260-270 \u00b0C and the onset of thermal decomposition between 380-430 \u00b0C.\"\n\t\t\t\t\t\t\/>\n\t\t\t\t\t<div class=\"elementor-element elementor-element-0e0a422 elementor-widget elementor-widget-spacer\" data-id=\"0e0a422\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2c36fea elementor-widget elementor-widget-heading\" data-id=\"2c36fea\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Glass transition temperature and mechanical behavior<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5093464 elementor-widget elementor-widget-spacer\" data-id=\"5093464\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2b2fdfa elementor-widget elementor-widget-text-editor\" data-id=\"2b2fdfa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The <a href=\"https:\/\/www.linseis.com\/en\/wiki\/glass-transition-temperature\/\"><strong>glass transition temperature <sub>Tg<\/sub><\/strong><\/a> of FEP is well below room temperature; literature values indicate approx. -80 \u00b0C for the secondary transition, measured by DSC or mechanical spectroscopy. [ <sup>1]<\/sup> Due to the strong segment mobility below the melting point, FEP behaves as a tough but flexible thermoplastic material throughout its usual range of applications. In TMA or DMA measurements, the transition range is manifested by changes in the coefficient of thermal expansion or storage modulus. This is particularly relevant for engineers when FEP components are combined with other materials &#8211; for example in composite systems or multilayer hoses &#8211; in order to minimize thermally induced stresses and delamination.  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ab69d4f elementor-widget elementor-widget-spacer\" data-id=\"ab69d4f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e8790b5 elementor-widget elementor-widget-heading\" data-id=\"e8790b5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Typical fields of application<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3b81415 elementor-widget elementor-widget-spacer\" data-id=\"3b81415\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5d6b329 elementor-widget elementor-widget-text-editor\" data-id=\"5d6b329\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>FEP tubing is widely used in chemical and pharmaceutical process engineering: for high-purity media, aggressive acids\/bases and solvents where transparency is also required for visual flow control. [ <sup>4]<\/sup> In medical technology, FEP tubing and catheters enable the combination of biocompatibility, chemical inertness, low friction and optical visibility. [ <sup>2]<\/sup> In electrical engineering, FEP is used as cable insulation and heat shrink material when high dielectric strength, low dielectric losses and long-term temperature resistance are required. [ <sup>1,2]<\/sup> Optical applications range from transparent cover films and viewing windows in aggressive environments to components for UV applications and 3D printing cut films, where FEP demonstrates its high transmission and low adhesion. [ <sup>1]<\/sup> In all of these cases, low friction, electrical insulation and optical clarity have a direct functional effect &#8211; for example in sliding cables, translucent reaction cells or optically monitored fluid paths.    <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-49c8dc2 elementor-widget elementor-widget-spacer\" data-id=\"49c8dc2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6d63769 elementor-widget elementor-widget-heading\" data-id=\"6d63769\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Thermal characterization with Linseis devices<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d5a1734 elementor-widget elementor-widget-spacer\" data-id=\"d5a1734\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8bd1831 elementor-widget elementor-widget-text-editor\" data-id=\"8bd1831\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>For the complete thermal characterization of FEP &#8211; from crystallinity and melting behavior to glass transition and decomposition analysis &#8211; Linseis offers a broad portfolio of thermal analysis devices. Simultaneous TG-DSC systems from the LINSEIS STA series (e.g. <a href=\"https:\/\/www.linseis.com\/en\/instruments\/thermal-analysis\/simultaneous-thermal-analyzer-tga-dsc\/sta-l82\/\"><strong>STA L82<\/strong><\/a>) enable the simultaneous recording of mass changes and heat flows and thus provide comprehensive data on melting points, crystallization processes, oxidation and thermal stability of FEP compounds &#8211; all in one measuring run. Thermomechanical analysis (TMA) is available for targeted investigations of the glass transition, thermal expansion and mechanical behavior of FEP films, tubes and composite systems, <a href=\"https:\/\/www.linseis.com\/en\/wiki\/determination-of-the-cte-density\/\"><strong>CTE<\/strong><\/a> and soft transitions can be precisely determined. In addition, classic DSC systems offer high-resolution measurements of melting and crystallization peaks as well as enthalpies &#8211; particularly relevant for the development of specialized FEP variants and copolymers. This provides laboratory staff, researchers and engineers with a consistent database for designing FEP specifically for dynamic, optically accessible and electrically demanding applications.     <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c43d94c elementor-widget elementor-widget-spacer\" data-id=\"c43d94c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\n\t\t\t<img class=\"e-image-base e-06deb5a-c300e16\" \n\t\t\t\t\tdata-interaction-id=\"06deb5a\" \n\t\t \n\t\t data-e-type=\"widget\" data-id=\"06deb5a\" \n\t\t\t\t\t\t\t\t\tid=\"127994\"\n\t\t\t\t\t\t\t\t\t\t\t\tsrc=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2026\/05\/FEP-Polymer_Linseis-Geraete.png\"\n\t\t\t\t\t\t\t\t\t\t\t\twidth=\"1140\"\n\t\t\t\t\t\t\t\t\t\t\t\theight=\"641\"\n\t\t\t\t\t\t\t\t\t\t\t\tsrcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2026\/05\/FEP-Polymer_Linseis-Geraete.png 1140w, https:\/\/www.linseis.com\/wp-content\/uploads\/2026\/05\/FEP-Polymer_Linseis-Geraete-300x169.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2026\/05\/FEP-Polymer_Linseis-Geraete-1024x576.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2026\/05\/FEP-Polymer_Linseis-Geraete-768x432.png 768w\"\n\t\t\t\t\t\t\t\t\t\t\t\talt=\"LINSEIS devices (DSC, STA and TMA) for thermal characterization of FEP fluoropolymers, including analysis of crystallinity, thermal stability, melting behavior and thermomechanical properties.\"\n\t\t\t\t\t\t\/>\n\t\t\t\t\t<div class=\"elementor-element elementor-element-422900a elementor-widget elementor-widget-spacer\" data-id=\"422900a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d311197 elementor-widget elementor-widget-heading\" data-id=\"d311197\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Bibliography<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bc5a2c1 elementor-widget elementor-widget-spacer\" data-id=\"bc5a2c1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7ec0ae5 elementor-widget elementor-widget-text-editor\" data-id=\"7ec0ae5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>[1] Zeus Inc.: <em>&#8220;New Focus on FEP&#8221;<\/em>, Technical Whitepaper (material properties, <sub>Tg<\/sub>, melting point, thermal stability). <a href=\"https:\/\/www.zeusinc.com\" target=\"_blank\" rel=\"noopener\">www.zeusinc.com<\/a><\/p><p>[2] Wikipedia: <em>&#8220;Fluorinated ethylene propylene&#8221;<\/em>, basic material data and applications. <a href=\"https:\/\/en.wikipedia.org\/wiki\/Fluorinated_ethylene_propylene\" target=\"_blank\" rel=\"noopener\">https:\/\/en.wikipedia.org\/wiki\/Fluorinated_ethylene_propylene<\/a><\/p><p>[3] Functional Materials (Ukraine): <em>&#8220;Structure, crystallization and thermal behavior of FEP based composites&#8221;<\/em>, influence of blends on crystallinity and thermal stability <a href=\"https:\/\/functmater.org\" target=\"_blank\" rel=\"noopener\">. www.functmater.org<\/a><\/p><p>[4] Gremco: <em>&#8220;FEP tubing: Characteristics, Properties and applications&#8221;<\/em>, Applications and properties of FEP tubing. <a href=\"https:\/\/www.gremco.de\" target=\"_blank\" rel=\"noopener\">www.gremco.de<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>FEP (Fluorinated Ethylene Propylene Copolymer) combines low friction, excellent electrical insulation and high optical clarity in one material &#8211; a combination that predestines it for dynamic applications in which media flow, movement and signal transmission must be reliably controlled. [1,2] The following text highlights the key structural and thermal properties of FEP and shows how these can be specifically characterized using thermal analysis methods &#8211; and corresponding solutions from Linseis. <\/p>\n","protected":false},"author":3,"featured_media":127995,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[106],"tags":[],"class_list":["post-127997","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-wiki"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/posts\/127997","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/comments?post=127997"}],"version-history":[{"count":0,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/posts\/127997\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/media\/127995"}],"wp:attachment":[{"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/media?parent=127997"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/categories?post=127997"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/tags?post=127997"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}