{"id":97159,"date":"2025-09-16T08:00:00","date_gmt":"2025-09-16T06:00:00","guid":{"rendered":"https:\/\/www.linseis.com\/?p=97159"},"modified":"2025-12-19T08:50:34","modified_gmt":"2025-12-19T07:50:34","slug":"amorphous-vs-semi-crystalline-polymers-standard-compliant-dsc-measurement-according-to-iso-11357-astm-d3418","status":"publish","type":"post","link":"https:\/\/www.linseis.com\/en\/wiki\/amorphous-vs-semi-crystalline-polymers-standard-compliant-dsc-measurement-according-to-iso-11357-astm-d3418\/","title":{"rendered":"Amorphous vs. semi-crystalline polymers: standard-compliant DSC measurement according to ISO 11357 &amp; ASTM D3418"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"97159\" class=\"elementor elementor-97159 elementor-97126\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dfef493 e-flex e-con-boxed e-con e-parent\" data-id=\"dfef493\" 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-a173083 e-con-full e-flex e-con e-child\" data-id=\"a173083\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-5b74af3 e-con-full e-flex e-con e-child\" data-id=\"5b74af3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-3f46118 e-con-full e-flex e-con e-child\" data-id=\"3f46118\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-c0fca54 e-con-full e-flex e-con e-child\" data-id=\"c0fca54\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-cba4766 e-con-full e-flex e-con e-child\" data-id=\"cba4766\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-8153631 e-con-full e-flex e-con e-child\" data-id=\"8153631\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-e2385d5 e-con-full e-flex e-con e-child\" data-id=\"e2385d5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-2c9cae9 e-con-full e-flex e-con e-child\" data-id=\"2c9cae9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9fc0a8a elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"9fc0a8a\" 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__9fc0a8a\" 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__9fc0a8a\" 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__9fc0a8a\" 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-cd483af elementor-widget elementor-widget-spacer\" data-id=\"cd483af\" 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-eadaef7 elementor-widget elementor-widget-heading\" data-id=\"eadaef7\" 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\">Why DSC is essential in polymer characterization<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8cc5755 elementor-widget elementor-widget-text-editor\" data-id=\"8cc5755\" 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>When it comes to <strong><a href=\"https:\/\/www.linseis.com\/en\/applications\/polymers\/\">polymers<\/a><\/strong> to characterize polymers, the <a href=\"https:\/\/www.linseis.com\/en\/instruments\/differential-scanning-calorimeter-dsc\/\"><strong>differential dynamic calorimetry (DSC)<\/strong> <\/a>is one of the most reliable methods. It makes it possible to precisely determine thermal transitions such as glass transition, crystallization or melting point &#8211; precisely those properties that are decisive for the processing and use of a plastic. <\/p><p>This shows that not every plastic behaves in the same way. The structural difference between amorphous and semi-crystalline influences which thermal signals are visible in the DSC &#8211; and how they are to be interpreted. Compliance with internationally recognized standards is essential for reproducible and comparable results. ISO 11357 (Europe\/international) and ASTM D3418 (USA) are two proven standards that set clear requirements for calibration, sample preparation and evaluation.   <\/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-539e226 elementor-widget elementor-widget-spacer\" data-id=\"539e226\" 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-e35f65b elementor-widget elementor-widget-heading\" data-id=\"e35f65b\" 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\">Structural differences: amorphous and semi-crystalline in comparison<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d5254e1 elementor-widget elementor-widget-text-editor\" data-id=\"d5254e1\" 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 fundamental difference between amorphous and semi-crystalline polymers lies in their molecular structure &#8211; and it is precisely this structure that determines their thermal behavior.<\/p><p>Amorphous polymers have a disordered, confused arrangement of polymer chains. This structure does not allow a crystalline state of order. Typical representatives are <strong><a href=\"https:\/\/www.linseis.com\/en\/wiki\/polystyrene-ps-a-detailed-analysis\/\">polystyrene (PS)<\/a><\/strong>polycarbonate (PC) and polymethyl methacrylate (PMMA). Characteristic of amorphous polymers is that they do not have a melting point in the classic sense. Instead, they exhibit a glass transition temperature (Tg) &#8211; the range in which the material changes from a glassy to a rubbery state. The DSC plot shows this transition as a step or kink in the baseline.     <\/p><p>Semi-crystalline polymers, on the other hand, consist of a combination of ordered (crystalline) and disordered (amorphous) areas. Typical representatives are <strong><a href=\"https:\/\/www.linseis.com\/en\/wiki\/high-density-polyethylene-hdpe-an-inside-look\/\">polyethylene (PE)<\/a>,<\/strong> polypropylene (PP) and <a href=\"https:\/\/www.linseis.com\/en\/wiki\/polyamides-an-overview\/\">polyamide (PA)<\/a>. In addition to the glass transition (often difficult to detect), they show pronounced crystallization and melting peaks in the DSC. During cooling, the chains partially crystallize (exothermic peak), while these structures melt during reheating (endothermic peak).   <\/p><p>The distinction is essential: while amorphous polymers are ideal for optically clear applications or fast molding, semi-crystalline grades often offer higher mechanical strength and chemical resistance.<\/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-eefb9a9 elementor-widget elementor-widget-heading\" data-id=\"eefb9a9\" 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\">Functionality of the DSC and typical measured variables<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e2f4f8f elementor-widget elementor-widget-text-editor\" data-id=\"e2f4f8f\" 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>DSC measures the heat flow required to heat up or cool down a sample compared to an inert reference. Differences in heat flow indicate that structural or physical changes are taking place in the material. <\/p><p>Key performance indicators are:<\/p><ul><li><a href=\"https:\/\/www.linseis.com\/en\/wiki\/glass-transition-temperature\/\"><strong>Tg (glass transition)<\/strong><\/a>: visible in amorphous and semi-crystalline polymers<\/li><li><a href=\"https:\/\/www.linseis.com\/en\/wiki\/what-happens-during-crystallization-tc\/\"><strong>Tc (crystallization)<\/strong><\/a>exothermic peak during cooling of semi-crystalline materials<\/li><li><a href=\"https:\/\/www.linseis.com\/en\/wiki\/melting-point-crystallization-and-glass-transition-in-polymers\/\"><strong>Tm (melting point)<\/strong><\/a>endothermic peak when heating crystalline areas<\/li><li><a href=\"https:\/\/www.linseis.com\/en\/properties\/enthalpy\/\"><strong>\u0394H (enthalpy)<\/strong><\/a>Area under the peak &#8211; used, for example, to determine the crystallinity<\/li><\/ul><p>The shape of the thermogram provides valuable information on processability, thermal stability, ageing processes or differences due to additives.<\/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-253d5c5 elementor-widget elementor-widget-heading\" data-id=\"253d5c5\" 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\">Standard-compliant implementation: ISO 11357 and ASTM D3418 in detail<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-39cef7f elementor-widget elementor-widget-text-editor\" data-id=\"39cef7f\" 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>Carrying out a <a href=\"https:\/\/www.linseis.com\/en\/instruments\/differential-scanning-calorimeter-dsc\/\"><strong>DSC measurement<\/strong><\/a> may seem simple at first glance: weigh the sample, start the temperature program, evaluate the thermogram. However, in order to obtain reproducible, comparable and interpretable results, exact compliance with the normative specifications is essential. The ISO 11357 and ASTM D3418 standards provide clear instructions for this.  <\/p><ul><li style=\"list-style-type: none;\"><ul><li>Heating and cooling rate: The standards generally recommend a linear rate of 10 K\/min in order to achieve a good compromise between measurement time, sensitivity and thermal equilibrium. Too high rates can smear peaks, too low rates can unnecessarily prolong measurements. <\/li><li>Calibration: Calibration is carried out using reference materials such as indium, tin or lead, whose transition temperatures and enthalpies are precisely documented. Calibration must be carried out regularly &#8211; ideally annually &#8211; and under the specific measurement conditions. <\/li><li>Sample preparation: The ideal sample mass is 5-10 mg. An undried sample, such as PE, can produce artifacts, e.g. an apparent peak at ~100 \u00b0C due to evaporating moisture. This effect disappears by drying under vacuum at 80 \u00b0C.  <\/li><li>Atmosphere: The measurement is usually carried out under nitrogen to avoid oxidation. Oxygen can be used for certain tests (e.g. OIT). The purge gas rate is usually 50-60 ml\/min.  <\/li><\/ul><\/li><\/ul>\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-efcd85e elementor-widget elementor-widget-spacer\" data-id=\"efcd85e\" 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-5d11b11 elementor-widget elementor-widget-image\" data-id=\"5d11b11\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/09\/175-1024x576.png\" class=\"attachment-large size-large wp-image-97141\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/09\/175-1024x576.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/09\/175-300x169.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/09\/175-768x432.png 768w, https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/09\/175.png 1140w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\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-469331e elementor-widget elementor-widget-heading\" data-id=\"469331e\" 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\">Summary of the standard-relevant parameters<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7332b97 elementor-widget elementor-widget-shortcode\" data-id=\"7332b97\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">\n<table id=\"tablepress-236\" class=\"tablepress tablepress-id-236\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\">parameters<\/th><th class=\"column-2\">standard specification<\/th><th class=\"column-3\">significance<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-striping row-hover\">\n<tr class=\"row-2\">\n\t<td class=\"column-1\">Heating\/cooling rate<\/td><td class=\"column-2\">Standard: 10 K\/min<\/td><td class=\"column-3\">Clearly recognizable transitions, reproducible data<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">calibration<\/td><td class=\"column-2\">Indium, tin, etc.<\/td><td class=\"column-3\">Exact temperature and \u0394H values<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">sample mass<\/td><td class=\"column-2\">5\u201310 mg<\/td><td class=\"column-3\">Uniform heat transfer, clean signal<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">atmosphere<\/td><td class=\"column-2\">Nitrogen or O2<\/td><td class=\"column-3\">Prevention of oxidation, defined conditions<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-236 from cache --><\/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-80307ac elementor-widget elementor-widget-heading\" data-id=\"80307ac\" 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\">What can be derived from the data?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a0bd6fc elementor-widget elementor-widget-text-editor\" data-id=\"a0bd6fc\" 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\/instruments\/differential-scanning-calorimeter-dsc\/\"><strong>DSC measurement<\/strong> <\/a>provides for <strong><a href=\"https:\/\/www.linseis.com\/en\/wiki\/low-density-polyethylene-ldpe-a-summary\/\">polyethylene (PE)<\/a><\/strong> a variety of revealing information. The melting temperature (Tm) shows how crystalline the material is, which in turn provides information about its homogeneity and processability. A sharp melting peak indicates a uniform material, while broad or shifted peaks indicate additives, recyclates or impurities.  <\/p><p>The crystallinity, calculated via the enthalpy of fusion compared to the ideal value (approx. 293 J\/g for PE), is decisive for the mechanical properties. A high crystallinity promotes rigidity and chemical resistance, while a lower crystallinity is associated with greater flexibility and more transparent properties. <\/p><p>In addition, conclusions can be drawn about previous thermal experience: Exothermic peaks during cooling or second heating indicate re-crystallization. Artifacts caused by moisture, such as a peak at around 100 \u00b0C, can be avoided by suitable sample preparation. <\/p><p>The method is used not least for quality assurance, for example when comparing different batches, suppliers or material qualities. This makes DSC measurement a strategic tool for material development, process optimization and long-term 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-6013d48 elementor-widget elementor-widget-spacer\" data-id=\"6013d48\" 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-5211a85 elementor-widget elementor-widget-heading\" data-id=\"5211a85\" 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\">Summary: What the DSC measurement reveals about PE<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e64db55 elementor-widget elementor-widget-text-editor\" data-id=\"e64db55\" 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<ul><li>The melting temperature indicates purity, homogeneity and suitability for processing.<\/li><li>Crystallinity influences stiffness, shrinkage and flexibility.<\/li><li>Re-crystallization and thermal history can be assessed on the basis of exothermic peaks.<\/li><li>Moisture artifacts lead to misinterpretations and must be eliminated by drying.<\/li><li>The method is ideal for batch control and quality assurance.<\/li><\/ul>\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-69338fb elementor-widget elementor-widget-heading\" data-id=\"69338fb\" 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\">Conclusion<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b5d57a7 elementor-widget elementor-widget-text-editor\" data-id=\"b5d57a7\" 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\/instruments\/differential-scanning-calorimeter-dsc\/\" data-wplink-edit=\"true\"><strong>DSC measurement<\/strong><\/a> is much more than a routine laboratory process &#8211; it provides crucial information about the structure, purity and thermal stability of polymers. In the case of polyethylene, for example, it can be used not only to avoid processing problems, but also to achieve targeted product improvements. Through standardized preparation and structured evaluation, sources of error can be identified, material properties optimized and product quality assured in the long term. Those who interpret thermograms correctly turn data into competitive advantages.   <\/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-4d7b9f2 elementor-widget elementor-widget-spacer\" data-id=\"4d7b9f2\" 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>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\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>When it comes to characterizing polymers, differential dynamic calorimetry (DSC) is one of the most reliable methods.  <\/p>\n","protected":false},"author":15,"featured_media":97130,"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-97159","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\/97159","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\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/comments?post=97159"}],"version-history":[{"count":0,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/posts\/97159\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/media\/97130"}],"wp:attachment":[{"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/media?parent=97159"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/categories?post=97159"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/tags?post=97159"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}