{"id":1015,"date":"2024-02-04T14:00:38","date_gmt":"2024-02-04T06:00:38","guid":{"rendered":"https:\/\/www.joyforce.com\/?p=1015"},"modified":"2024-02-05T13:26:18","modified_gmt":"2024-02-05T05:26:18","slug":"modified-with-polyvinyl-alcohol","status":"publish","type":"post","link":"https:\/\/www.joyforce.com\/pt\/blogs\/modified-with-polyvinyl-alcohol.html","title":{"rendered":"Modificado com \u00e1lcool polivin\u00edlico"},"content":{"rendered":"<p style=\"font-weight: 400;\">O \u00e1lcool polivin\u00edlico (PVA) \u00e9 um pol\u00edmero org\u00e2nico incolor, n\u00e3o t\u00f3xico, n\u00e3o corrosivo e biodegrad\u00e1vel, sol\u00favel em \u00e1gua. Atualmente, al\u00e9m de ser a mat\u00e9ria-prima do vinilon, o PVA \u00e9 amplamente utilizado em colagem de tecidos, revestimentos, adesivos, emulsificantes, filmes e outros campos industriais. No entanto, a mol\u00e9cula de PVA cont\u00e9m um grande n\u00famero de grupos hidroxila, resultando em baixa resist\u00eancia \u00e0 \u00e1gua e estabilidade do PVA, o que afeta sua aplica\u00e7\u00e3o. Na aplica\u00e7\u00e3o do setor de fibras qu\u00edmicas, o PVA tem desvantagens como esfolamento, forma\u00e7\u00e3o de espuma e ades\u00e3o insuficiente \u00e0s fibras. Portanto, os m\u00e9todos de modifica\u00e7\u00e3o qu\u00edmica s\u00e3o geralmente usados para melhorar sua resist\u00eancia \u00e0 \u00e1gua. A modifica\u00e7\u00e3o do PVA usa principalmente a reatividade qu\u00edmica de liga\u00e7\u00f5es duplas de acetato de vinila, grupos \u00e9ster e grupos hidroxila ap\u00f3s a alco\u00f3lise para alterar os grupos ou estruturas da cadeia lateral e introduzir outros mon\u00f4meros para se tornarem copol\u00edmeros \u00e0 base de PVA; outros grupos funcionais que alteram a estrutura qu\u00edmica das macromol\u00e9culas de PVA.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-1008\" src=\"https:\/\/www.joyforce.com\/wp-content\/uploads\/2024\/02\/3-11.png\" alt=\"\" width=\"659\" height=\"414\" srcset=\"https:\/\/www.joyforce.com\/wp-content\/uploads\/2024\/02\/3-11.png 659w, https:\/\/www.joyforce.com\/wp-content\/uploads\/2024\/02\/3-11-300x188.png 300w, https:\/\/www.joyforce.com\/wp-content\/uploads\/2024\/02\/3-11-18x12.png 18w, https:\/\/www.joyforce.com\/wp-content\/uploads\/2024\/02\/3-11-600x377.png 600w\" sizes=\"(max-width: 659px) 100vw, 659px\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>O \u00e1lcool polivin\u00edlico (PVA) \u00e9 um pol\u00edmero org\u00e2nico incolor, n\u00e3o t\u00f3xico, n\u00e3o corrosivo e biodegrad\u00e1vel, sol\u00favel em \u00e1gua. Atualmente, al\u00e9m de ser a mat\u00e9ria-prima do vinilon, o PVA \u00e9 amplamente utilizado em colagem de tecidos, revestimentos, adesivos, emulsificantes, filmes e outros campos industriais. No entanto, a mol\u00e9cula de PVA cont\u00e9m um grande n\u00famero de grupos hidroxila, o que resulta em baixa resist\u00eancia \u00e0 \u00e1gua e [...]<\/p>","protected":false},"author":1,"featured_media":1008,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[43],"tags":[],"class_list":["post-1015","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Modified with polyvinyl alcohol - JOYFORCE INDUSTRIAL<\/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:\/\/www.joyforce.com\/pt\/blogs\/modified-with-polyvinyl-alcohol.html\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Modified with polyvinyl alcohol - JOYFORCE INDUSTRIAL\" \/>\n<meta property=\"og:description\" content=\"Polyvinyl alcohol (PVA) is a colorless, non-toxic, non-corrosive, biodegradable water-soluble organic polymer. 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