{"id":103212,"date":"2024-07-22T14:01:01","date_gmt":"2024-07-22T12:01:01","guid":{"rendered":"https:\/\/www.linseis.com\/sem-categoria\/temperatura-de-transicao-vitrea\/"},"modified":"2026-01-12T09:38:31","modified_gmt":"2026-01-12T08:38:31","slug":"temperatura-de-transicao-vitrea","status":"publish","type":"post","link":"https:\/\/www.linseis.com\/pt-pt\/conhecimentos\/temperatura-de-transicao-vitrea\/","title":{"rendered":"Temperatura de transi\u00e7\u00e3o v\u00edtrea"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"103212\" class=\"elementor elementor-103212 elementor-16078\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9eb8745 e-flex e-con-boxed e-con e-parent\" data-id=\"9eb8745\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4761028 elementor-toc--minimized-on-tablet elementor-invisible elementor-widget elementor-widget-table-of-contents\" data-id=\"4761028\" 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;_animation&quot;:&quot;fadeInUp&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\t\u00cdndice\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__4761028\" 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__4761028\" 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__4761028\" 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-8a9139e elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"8a9139e\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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\">Qual \u00e9 a temperatura de transi\u00e7\u00e3o v\u00edtrea (Tg)?\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ffaef65 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"ffaef65\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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>O ponto <strong>de transi\u00e7\u00e3o<\/strong> v\u00edtrea ou <strong>temperatura de transi\u00e7\u00e3o v\u00edtrea Tg<\/strong> \u00e9 um ponto na escala de temperatura em que um pol\u00edmero ou vidro muda para um estado viscoso e de borracha. No entanto, isto n\u00e3o \u00e9 o mesmo que o <a href=\"https:\/\/www.linseis.com\/pt-pt\/conhecimentos\/ponto-de-fusao-cristalizacao-e-transicao-vitrea-em-polimeros\/\">\n  <strong>ponto de fus\u00e3o<\/strong>\n<\/a> Mas, no entanto, o ponto de transi\u00e7\u00e3o v\u00edtrea pode ser equiparado ao ponto de fus\u00e3o. <\/p><p>O termo temperatura de transi\u00e7\u00e3o v\u00edtrea \u00e9 utilizado para metais amorfos e temperatura de transforma\u00e7\u00e3o para vidros inorg\u00e2nicos n\u00e3o met\u00e1licos.<\/p><p>O ponto de transi\u00e7\u00e3o v\u00edtrea \u00e9 um par\u00e2metro fixo, especialmente para os pol\u00edmeros. Uma transi\u00e7\u00e3o v\u00edtrea em pol\u00edmeros n\u00e3o \u00e9 uma verdadeira transi\u00e7\u00e3o de fase, uma vez que apenas uma pequena parte da amostra altera o seu estado agregado. Para ser mais preciso, as cadeias individuais de pol\u00edmeros podem ser movidas umas contra as outras sem mudar para o estado fundido.  <\/p><p>Como a transi\u00e7\u00e3o v\u00edtrea n\u00e3o pode ser atribu\u00edda com precis\u00e3o a uma temperatura espec\u00edfica, mas depende do m\u00e9todo de medi\u00e7\u00e3o e das condi\u00e7\u00f5es presentes, \u00e9 importante cumprir as normas ao determin\u00e1-la e ser capaz de controlar com precis\u00e3o os par\u00e2metros de medi\u00e7\u00e3o.<\/p><p>A temperatura exacta de transi\u00e7\u00e3o v\u00edtrea deve, portanto, ser especificada para cada <a href=\"https:\/\/www.linseis.com\/startseite\/methoden\/\">\n  <strong>m\u00e9todo de medi\u00e7\u00e3o<\/strong>\n<\/a> da <a href=\"https:\/\/www.linseis.com\/messgeraete\/thermische-analyse\/\">\n  <strong>an\u00e1lise t\u00e9rmica<\/strong>\n<\/a> deve ser especificada para cada temperatura de transi\u00e7\u00e3o v\u00edtrea.<\/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-4bc6982 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"4bc6982\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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\">M\u00e9todos de medi\u00e7\u00e3o para determinar a temperatura de transi\u00e7\u00e3o v\u00edtrea\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-561dada elementor-widget__width-initial elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"561dada\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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\tPara a determina\u00e7\u00e3o da temperatura de transi\u00e7\u00e3o v\u00edtrea, est\u00e3o dispon\u00edveis os seguintes m\u00e9todos de medi\u00e7\u00e3o:\n\n\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-d3e8ff7 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"d3e8ff7\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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>An\u00e1lise din\u00e2mico-mec\u00e2nica (DMA)<\/li><li><a href=\"https:\/\/www.linseis.com\/startseite\/methoden\/dynamische-differenz-kalorimetrie\/\"><strong>Calorimetria diferencial de varrimento (DSC)<\/strong><\/a><\/li><li><a href=\"https:\/\/www.linseis.com\/startseite\/messgeraete\/thermische-analyse__trashed\/simultane-thermische-analyse\/\"><strong>An\u00e1lise t\u00e9rmica combinada (TGA+DSC)<\/strong><\/a><\/li><li><a href=\"https:\/\/www.linseis.com\/startseite\/methoden\/dilatometrie\/\"><strong>Dilatometria (DIL)<\/strong><\/a><\/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-377009b elementor-widget elementor-widget-spacer\" data-id=\"377009b\" 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<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>A temperatura de transi\u00e7\u00e3o v\u00edtrea Tg \u00e9 um ponto na escala de temperatura em que um pol\u00edmero ou vidro muda para um estado viscoso e de borracha. No entanto, isto n\u00e3o \u00e9 o mesmo que o ponto de fus\u00e3o. <\/p>\n","protected":false},"author":3,"featured_media":33957,"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-103212","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\/103212","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\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/comments?post=103212"}],"version-history":[{"count":0,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/posts\/103212\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/media\/33957"}],"wp:attachment":[{"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/media?parent=103212"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/categories?post=103212"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/tags?post=103212"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}