{"id":103033,"date":"2025-09-16T08:00:00","date_gmt":"2025-09-16T06:00:00","guid":{"rendered":"https:\/\/www.linseis.com\/sem-categoria\/polimeros-amorfos-vs-semi-cristalinos-medicao-dsc-em-conformidade-com-a-norma-iso-11357-e-astm-d3418\/"},"modified":"2026-01-12T09:25:08","modified_gmt":"2026-01-12T08:25:08","slug":"polimeros-amorfos-vs-semi-cristalinos-medicao-dsc-em-conformidade-com-a-norma-iso-11357-e-astm-d3418","status":"publish","type":"post","link":"https:\/\/www.linseis.com\/pt-pt\/conhecimentos\/polimeros-amorfos-vs-semi-cristalinos-medicao-dsc-em-conformidade-com-a-norma-iso-11357-e-astm-d3418\/","title":{"rendered":"Pol\u00edmeros amorfos vs. semi-cristalinos: medi\u00e7\u00e3o DSC em conformidade com a norma ISO 11357 e ASTM D3418"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"103033\" class=\"elementor elementor-103033 elementor-97126\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element 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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\">Porque \u00e9 que o DSC \u00e9 essencial na carateriza\u00e7\u00e3o de pol\u00edmeros<\/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>Quando se trata de <strong>\n  <a href=\"https:\/\/www.linseis.com\/applikationen\/polymere\/\">pol\u00edmeros<\/a>\n<\/strong> para caraterizar pol\u00edmeros, a <a href=\"https:\/\/www.linseis.com\/pt-pt\/?post_type=messgeraete&#038;p=103025\"><strong>calorimetria din\u00e2mica diferencial (DSC)<\/strong> <\/a>\u00e9 um dos m\u00e9todos mais fi\u00e1veis. Permite determinar com precis\u00e3o as transi\u00e7\u00f5es t\u00e9rmicas, como a transi\u00e7\u00e3o v\u00edtrea, a cristaliza\u00e7\u00e3o ou o ponto de fus\u00e3o &#8211; por outras palavras, precisamente as propriedades que s\u00e3o decisivas para o processamento e utiliza\u00e7\u00e3o de um pl\u00e1stico. <\/p><p>Isto mostra que nem todos os pl\u00e1sticos se comportam da mesma forma. A diferen\u00e7a estrutural entre amorfo e semi-cristalino influencia os sinais t\u00e9rmicos que se tornam vis\u00edveis no DSC &#8211; e como devem ser interpretados. O cumprimento de normas reconhecidas internacionalmente \u00e9 essencial para obter resultados reprodut\u00edveis e compar\u00e1veis. A ISO 11357 (Europa\/internacional) e a ASTM D3418 (EUA) s\u00e3o duas normas comprovadas que estabelecem requisitos claros para a calibra\u00e7\u00e3o, prepara\u00e7\u00e3o de amostras e avalia\u00e7\u00e3o.   <\/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\">Diferen\u00e7as estruturais: compara\u00e7\u00e3o entre o amorfo e o semi-cristalino<\/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>A diferen\u00e7a fundamental entre os pol\u00edmeros amorfos e semi-cristalinos reside na sua estrutura molecular &#8211; e \u00e9 precisamente esta estrutura que determina o seu comportamento t\u00e9rmico.<\/p><p>Os pol\u00edmeros amorfos t\u00eam uma disposi\u00e7\u00e3o desordenada e confusa das cadeias polim\u00e9ricas. Esta estrutura n\u00e3o permite um estado de ordem cristalina. Os representantes t\u00edpicos s\u00e3o <strong>\n  <a href=\"https:\/\/www.linseis.com\/wissen\/polystyrol-ps-eine-detaillierte-betrachtung\/\">poliestireno (PS)<\/a>\n<\/strong>o policarbonato (PC) e o polimetacrilato de metilo (PMMA). Os pol\u00edmeros amorfos s\u00e3o caracterizados pelo facto de n\u00e3o terem um ponto de fus\u00e3o no sentido cl\u00e1ssico. Em vez disso, apresentam uma temperatura de transi\u00e7\u00e3o v\u00edtrea (Tg) &#8211; o intervalo em que o material muda de um estado v\u00edtreo para um estado de borracha. O gr\u00e1fico DSC mostra esta transi\u00e7\u00e3o como um degrau ou uma dobra na linha de base.     <\/p><p>Os pol\u00edmeros semi-cristalinos, por outro lado, consistem numa combina\u00e7\u00e3o de \u00e1reas ordenadas (cristalinas) e desordenadas (amorfas). Os representantes t\u00edpicos s\u00e3o o <strong><a href=\"https:\/\/www.linseis.com\/wissen\/polyethylen-hoher-dichte-hdpe-ein-vertiefter-blick\/\">polietileno (PE)<\/a>,<\/strong> o polipropileno (PP) e <a href=\"https:\/\/www.linseis.com\/wissen\/polyamide-ein-einblick\/\">a poliamida (PA)<\/a>. Para al\u00e9m da transi\u00e7\u00e3o v\u00edtrea (muitas vezes dif\u00edcil de reconhecer), apresentam picos pronunciados de cristaliza\u00e7\u00e3o e fus\u00e3o no DSC. Durante o arrefecimento, as cadeias cristalizam parcialmente (pico exot\u00e9rmico), enquanto estas estruturas fundem durante o reaquecimento (pico endot\u00e9rmico).   <\/p><p>A distin\u00e7\u00e3o \u00e9 essencial: enquanto os pol\u00edmeros amorfos s\u00e3o ideais para aplica\u00e7\u00f5es opticamente transparentes ou para moldagem r\u00e1pida, os tipos semi-cristalinos oferecem frequentemente maior resist\u00eancia mec\u00e2nica e resist\u00eancia qu\u00edmica.<\/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\">Funcionalidade do DSC e vari\u00e1veis t\u00edpicas medidas<\/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>A DSC mede o fluxo de calor necess\u00e1rio para aquecer ou arrefecer uma amostra em compara\u00e7\u00e3o com uma refer\u00eancia inerte. As diferen\u00e7as no fluxo de calor indicam que est\u00e3o a ocorrer altera\u00e7\u00f5es estruturais ou f\u00edsicas no material. <\/p><p>Os principais indicadores de desempenho s\u00e3o:<\/p><ul><li><a href=\"https:\/\/www.linseis.com\/wissen\/glasuebergangstemperatur\/\">\n  <strong>Tg (transi\u00e7\u00e3o v\u00edtrea)<\/strong>\n<\/a>: vis\u00edvel em pol\u00edmeros amorfos e semi-cristalinos<\/li><li><a href=\"https:\/\/www.linseis.com\/wissen\/was-passiert-bei-der-kristallisation-tc\/\">\n  <strong>Tc (cristaliza\u00e7\u00e3o)<\/strong>\n<\/a>pico exot\u00e9rmico durante o arrefecimento de materiais semi-cristalinos<\/li><li><a href=\"https:\/\/www.linseis.com\/wissen\/schmelzpunkt-kristallisation-und-glasuebergang-bei-polymeren\/\">\n  <strong>Tm (ponto de fus\u00e3o)<\/strong>\n<\/a>pico endot\u00e9rmico quando aquece \u00e1reas cristalinas<\/li><li><a href=\"https:\/\/www.linseis.com\/messgroessen\/enthalpie\/\">\n  <strong>\u0394H (entalpia)<\/strong>\n<\/a>\u00c1rea sob o pico &#8211; utilizada, por exemplo, para determinar a cristalinidade<\/li><\/ul><p>A forma do termograma fornece informa\u00e7\u00f5es valiosas sobre a processabilidade, estabilidade t\u00e9rmica, processos de envelhecimento ou diferen\u00e7as devido a aditivos.<\/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\">Implementa\u00e7\u00e3o em conformidade com as normas: ISO 11357 e ASTM D3418 em pormenor<\/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>Efetuar uma <a href=\"https:\/\/www.linseis.com\/pt-pt\/?post_type=messgeraete&#038;p=103025\">\n  <strong>medi\u00e7\u00e3o DSC<\/strong>\n<\/a> pode parecer simples \u00e0 primeira vista: pesa a amostra, inicia o programa de temperatura, avalia o termograma. No entanto, para obter resultados reprodut\u00edveis, compar\u00e1veis e interpret\u00e1veis, \u00e9 essencial o cumprimento exato das especifica\u00e7\u00f5es normalizadas. As normas ISO 11357 e ASTM D3418 fornecem instru\u00e7\u00f5es claras para o efeito.  <\/p><ul><li style=\"list-style-type: none;\"><ul><li>Taxa de aquecimento e arrefecimento: As normas recomendam geralmente uma taxa linear de 10 K\/min para obter um bom compromisso entre o tempo de medi\u00e7\u00e3o, a sensibilidade e o equil\u00edbrio t\u00e9rmico. Taxas excessivamente altas podem manchar os picos, enquanto que taxas excessivamente baixas podem prolongar desnecessariamente as medi\u00e7\u00f5es. <\/li><li>Calibra\u00e7\u00e3o: A calibra\u00e7\u00e3o \u00e9 efectuada com materiais de refer\u00eancia como o \u00edndio, o estanho ou o chumbo, cujas temperaturas de transi\u00e7\u00e3o e entalpias est\u00e3o documentadas com precis\u00e3o. A calibra\u00e7\u00e3o deve ser efectuada regularmente &#8211; de prefer\u00eancia anualmente &#8211; e sob as condi\u00e7\u00f5es de medi\u00e7\u00e3o espec\u00edficas. <\/li><li>Prepara\u00e7\u00e3o da amostra: A massa ideal da amostra \u00e9 de 5-10 mg. Uma amostra n\u00e3o seca, como o PE, pode produzir artefactos, por exemplo, um pico aparente a ~100 \u00b0C devido \u00e0 evapora\u00e7\u00e3o da humidade. Este efeito desaparece com a secagem sob v\u00e1cuo a 80 \u00b0C.  <\/li><li>Atmosfera: A medi\u00e7\u00e3o \u00e9 geralmente efectuada em azoto para evitar a oxida\u00e7\u00e3o. O oxig\u00e9nio pode ser utilizado para certos ensaios (por exemplo, OIT). O d\u00e9bito do g\u00e1s de purga \u00e9 normalmente de 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-97147\" 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\">Resumo dos par\u00e2metros relevantes para a norma<\/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-235\" class=\"tablepress tablepress-id-235\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\">Parameter<\/th><th class=\"column-2\">Normvorgabe<\/th><th class=\"column-3\">Bedeutung<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-striping row-hover\">\n<tr class=\"row-2\">\n\t<td class=\"column-1\">Heiz-\/K\u00fchlrate<\/td><td class=\"column-2\">Standard: 10 K\/min<\/td><td class=\"column-3\">Klar erkennbare \u00dcberg\u00e4nge, reproduzierbare Daten<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">Kalibrierung<\/td><td class=\"column-2\">Indium, Zinn etc.<\/td><td class=\"column-3\">Exakte Temperatur- und \u0394H-Werte<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">Probenmasse<\/td><td class=\"column-2\">5\u201310 mg<\/td><td class=\"column-3\">Gleichm\u00e4\u00dfiger W\u00e4rmetransport, sauberes Signal<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">Atmosph\u00e4re<\/td><td class=\"column-2\">Stickstoff oder O2<\/td><td class=\"column-3\">Vermeidung von Oxidation, definierte Bedingungen<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-235 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\">O que \u00e9 que se pode deduzir dos dados?<\/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>A medi\u00e7\u00e3o <a href=\"https:\/\/www.linseis.com\/pt-pt\/?post_type=messgeraete&#038;p=103025\"><strong>medi\u00e7\u00e3o DSC<\/strong> <\/a>fornece para o <strong>\n  <a href=\"https:\/\/www.linseis.com\/wissen\/polyethylen-niedriger-dichte-ldpe-eine-zusammenfassung\/\">polietileno (PE)<\/a>\n<\/strong> uma variedade de informa\u00e7\u00f5es reveladoras. A temperatura de fus\u00e3o (Tm) mostra o grau de cristalinidade do material, o que, por sua vez, fornece informa\u00e7\u00f5es sobre a homogeneidade e a processabilidade. Um pico de fus\u00e3o acentuado indica um material uniforme, enquanto que picos largos ou deslocados indicam aditivos, reciclados ou impurezas.  <\/p><p>A cristalinidade, calculada atrav\u00e9s da entalpia de fus\u00e3o em compara\u00e7\u00e3o com o valor ideal (aprox. 293 J\/g para o PE), \u00e9 decisiva para as propriedades mec\u00e2nicas. Uma cristalinidade elevada promove a rigidez e a resist\u00eancia qu\u00edmica, enquanto uma cristalinidade mais baixa est\u00e1 associada a uma maior flexibilidade e a propriedades mais transparentes. <\/p><p>Para al\u00e9m disso, podem ser tiradas conclus\u00f5es sobre a experi\u00eancia t\u00e9rmica anterior: Os picos exot\u00e9rmicos durante o arrefecimento ou um segundo aquecimento indicam uma recristaliza\u00e7\u00e3o. Os artefactos causados pela humidade, como um pico a cerca de 100 \u00b0C, podem ser evitados atrav\u00e9s de uma prepara\u00e7\u00e3o adequada da amostra. <\/p><p>O m\u00e9todo \u00e9 utilizado tamb\u00e9m para garantir a qualidade, por exemplo, ao comparar diferentes lotes, fornecedores ou qualidades de materiais. Isto faz da medi\u00e7\u00e3o DSC uma ferramenta estrat\u00e9gica para o desenvolvimento de materiais, otimiza\u00e7\u00e3o de processos e garantia de qualidade a longo prazo. <\/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\">Resumo: O que a medi\u00e7\u00e3o DSC revela sobre o 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>A temperatura de fus\u00e3o d\u00e1 uma indica\u00e7\u00e3o da pureza, homogeneidade e adequa\u00e7\u00e3o ao processamento.<\/li><li>A cristalinidade influencia a rigidez, a contra\u00e7\u00e3o e a flexibilidade.<\/li><li>A recristaliza\u00e7\u00e3o e a hist\u00f3ria t\u00e9rmica podem ser avaliadas com base nos picos exot\u00e9rmicos.<\/li><li>Os artefactos de humidade conduzem a interpreta\u00e7\u00f5es erradas e devem ser eliminados por secagem.<\/li><li>O m\u00e9todo \u00e9 ideal para o controlo de lotes e a garantia de qualidade.<\/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\">Conclus\u00e3o<\/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>A medi\u00e7\u00e3o <a href=\"https:\/\/www.linseis.com\/pt-pt\/?post_type=messgeraete&#038;p=103025\" data-wplink-edit=\"true\">\n  <strong>medi\u00e7\u00e3o DSC<\/strong>\n<\/a> \u00e9 muito mais do que um processo laboratorial de rotina &#8211; fornece informa\u00e7\u00f5es cruciais sobre a estrutura, pureza e estabilidade t\u00e9rmica dos pol\u00edmeros. No caso do polietileno, por exemplo, pode ser utilizado n\u00e3o s\u00f3 para evitar problemas de processamento, mas tamb\u00e9m para obter melhorias espec\u00edficas do produto. Atrav\u00e9s de uma prepara\u00e7\u00e3o normalizada e de uma avalia\u00e7\u00e3o estruturada, \u00e9 poss\u00edvel identificar as fontes de erro, otimizar as propriedades do material e garantir a qualidade do produto a longo prazo. Aqueles que interpretam corretamente os termogramas transformam os dados em vantagens competitivas.   <\/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>Quando se trata de caraterizar pol\u00edmeros, a calorimetria din\u00e2mica diferencial (DSC) \u00e9 um dos m\u00e9todos mais fi\u00e1veis.  <\/p>\n","protected":false},"author":15,"featured_media":97136,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[654],"tags":[],"class_list":["post-103033","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-conhecimentos"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/posts\/103033","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/comments?post=103033"}],"version-history":[{"count":0,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/posts\/103033\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/media\/97136"}],"wp:attachment":[{"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/media?parent=103033"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/categories?post=103033"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/tags?post=103033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}