{"id":5647,"date":"2022-10-03T12:58:35","date_gmt":"2022-10-03T12:58:35","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=5647"},"modified":"2022-10-03T12:58:35","modified_gmt":"2022-10-03T12:58:35","slug":"why-is-it-necessary-to-add-a-polymerization-inhibitor-to-light-curing-coatings","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/pt\/why-is-it-necessary-to-add-a-polymerization-inhibitor-to-light-curing-coatings\/","title":{"rendered":"Por que \u00e9 necess\u00e1rio adicionar um inibidor de polimeriza\u00e7\u00e3o aos revestimentos fotopolimeriz\u00e1veis?"},"content":{"rendered":"<h1><strong>Por que \u00e9 necess\u00e1rio adicionar um inibidor de polimeriza\u00e7\u00e3o aos revestimentos fotopolimeriz\u00e1veis?<\/strong><\/h1>\n<p>No processo de produ\u00e7\u00e3o de revestimentos, alguns tipos de revestimentos cont\u00eam alta atividade de polimeriza\u00e7\u00e3o de subst\u00e2ncias, f\u00e1ceis de serem afetadas por fatores externos e polimeriza\u00e7\u00e3o, para revestimentos fotopolimeriz\u00e1veis, por exemplo, a composi\u00e7\u00e3o principal de olig\u00f4meros de revestimentos fotopolimeriz\u00e1veis e diluentes ativos s\u00e3o de alta atividade de polimeriza\u00e7\u00e3o de acrilatos, outra composi\u00e7\u00e3o importante de fotoiniciadores e extremamente f\u00e1cil de produzir radicais livres ou c\u00e1tions de subst\u00e2ncias. Em um sistema misto como esse, \u00e9 muito f\u00e1cil polimerizar devido \u00e0 influ\u00eancia da luz externa e do calor, portanto, \u00e9 necess\u00e1rio adicionar a quantidade certa de inibidor de polimeriza\u00e7\u00e3o. Este artigo apresenta aos leitores as caracter\u00edsticas e aplica\u00e7\u00f5es dos inibidores de polimeriza\u00e7\u00e3o.<\/p>\n<p>O inibidor de polimeriza\u00e7\u00e3o evita a ocorr\u00eancia de polimeriza\u00e7\u00e3o de aditivos. O inibidor de polimeriza\u00e7\u00e3o pode acabar com todos os radicais livres, de modo que a rea\u00e7\u00e3o de polimeriza\u00e7\u00e3o seja completamente interrompida. Os inibidores de polimeriza\u00e7\u00e3o comumente usados s\u00e3o fen\u00f3is, aminas arom\u00e1ticas, compostos nitro arom\u00e1ticos, etc. O oxig\u00eanio no ar \u00e9 um bom inibidor de polimeriza\u00e7\u00e3o, porque o pr\u00f3prio oxig\u00eanio \u00e9 um radical duplo, muito f\u00e1cil de combinar com radicais livres, gera radicais de per\u00f3xido, a atividade de inicia\u00e7\u00e3o \u00e9 bastante reduzida e, por fim, gera olig\u00f4meros alternados de liga\u00e7\u00e3o de mon\u00f4mero e per\u00f3xido. Os inibidores de polimeriza\u00e7\u00e3o de revestimentos fotopolimeriz\u00e1veis s\u00e3o usados principalmente fen\u00f3is, como p-hidroxianisol, hidroquinona e 2,6-di-terc-butil-p-cresol. Devido \u00e0 adi\u00e7\u00e3o de hidroquinona, que \u00e0s vezes causa o escurecimento da cor do sistema, geralmente n\u00e3o \u00e9 usada. Mas os inibidores de polimeriza\u00e7\u00e3o fen\u00f3licos devem estar na presen\u00e7a de oxig\u00eanio para mostrar o efeito de bloqueio da polimeriza\u00e7\u00e3o.<\/p>\n<p>Na presen\u00e7a de inibidores de polimeriza\u00e7\u00e3o fen\u00f3lica, os radicais de per\u00f3xido s\u00e3o rapidamente eliminados para garantir que haja concentra\u00e7\u00e3o suficiente de oxig\u00eanio no sistema, prolongando o tempo de bloqueio. Portanto, al\u00e9m da adi\u00e7\u00e3o de inibidores de polimeriza\u00e7\u00e3o fen\u00f3lica para melhorar a estabilidade do armazenamento, tamb\u00e9m devemos prestar aten\u00e7\u00e3o ao armazenamento da tinta no recipiente, que n\u00e3o pode estar muito cheio, para garantir que haja oxig\u00eanio suficiente.<\/p>","protected":false},"excerpt":{"rendered":"<p>Por que \u00e9 necess\u00e1rio adicionar um inibidor de polimeriza\u00e7\u00e3o aos revestimentos fotopolimeriz\u00e1veis? No processo de produ\u00e7\u00e3o de revestimentos, alguns tipos de revestimentos cont\u00eam alta atividade de polimeriza\u00e7\u00e3o de subst\u00e2ncias, f\u00e1ceis de serem afetadas por fatores externos e polimeriza\u00e7\u00e3o, para revestimentos fotopolimeriz\u00e1veis, por exemplo, a composi\u00e7\u00e3o principal de olig\u00f4meros de revestimentos fotopolimeriz\u00e1veis e diluentes ativos s\u00e3o de alta polimeriza\u00e7\u00e3o [...]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114],"tags":[],"class_list":["post-5647","post","type-post","status-publish","format-standard","hentry","category-catalysts-chemical-auxiliary-agents"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Why is it necessary to add a polymerization inhibitor to light-curing coatings? - Longchang Chemical<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangchemical.com\/pt\/why-is-it-necessary-to-add-a-polymerization-inhibitor-to-light-curing-coatings\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why is it necessary to add a polymerization inhibitor to light-curing coatings? - Longchang Chemical\" \/>\n<meta property=\"og:description\" content=\"Why is it necessary to add a polymerization inhibitor to light-curing coatings? 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