{"id":2716,"date":"2024-06-25T02:53:31","date_gmt":"2024-06-25T02:53:31","guid":{"rendered":"https:\/\/nylon-granules.com\/?p=2716"},"modified":"2024-06-25T03:16:33","modified_gmt":"2024-06-25T03:16:33","slug":"the-science-behind-plastic-yellowing","status":"publish","type":"post","link":"https:\/\/nylon-granules.com\/lt\/the-science-behind-plastic-yellowing\/","title":{"rendered":"Mokslo \u017einios apie plastiko geltonavim\u0105"},"content":{"rendered":"<div class=\"row\"  id=\"row-166370195\">\n\n\t<div id=\"col-1884580438\" class=\"col medium-6 small-12 large-6\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_75 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Turinys<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Perjungti turinio lentel\u0119\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Perjungti<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/nylon-granules.com\/lt\/the-science-behind-plastic-yellowing\/#Introduction_of_Plastic_Yellowing\" >Plastiko geltonavimo pristatymas\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/nylon-granules.com\/lt\/the-science-behind-plastic-yellowing\/#Degradation_of_the_Polymer_Chain\" >Polimero grandin\u0117s irimas<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/nylon-granules.com\/lt\/the-science-behind-plastic-yellowing\/#Accumulation_of_Impurities_and_Additives\" >Priemai\u0161\u0173 ir pried\u0173 kaupimasis<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nylon-granules.com\/lt\/the-science-behind-plastic-yellowing\/#Influence_of_Polymer_Type\" >Polimero tipo \u012ftaka<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nylon-granules.com\/lt\/the-science-behind-plastic-yellowing\/#Role_of_Catalysts\" >Katalizatori\u0173 vaidmuo<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/nylon-granules.com\/lt\/the-science-behind-plastic-yellowing\/#Conclusion\" >I\u0161vada<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/nylon-granules.com\/lt\/the-science-behind-plastic-yellowing\/#Summary_FAQ_on_Plastic_Yellowing\" >DUK apie plastiko geltonavim\u0105<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Introduction_of_Plastic_Yellowing\"><\/span><strong>Plastiko geltonavimo pristatymas\u00a0<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Plastiko pageltimas yra pla\u010diai paplitusi problema, turinti \u012ftakos daugeliui polimerini\u0173 med\u017eiag\u0173, d\u0117l kurios da\u017enai pablog\u0117ja mechanin\u0117s savyb\u0117s ir sutrump\u0117ja tarnavimo laikas. \u0160iame straipsnyje gilinamasi \u012f mokslinius \u0161io rei\u0161kinio paai\u0161kinimus ir nagrin\u0117jami pagrindiniai veiksniai, lemiantys plastiko spalvos pasikeitim\u0105.<\/p>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n\n\t<div id=\"col-1174456442\" class=\"col medium-6 small-12 large-6\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_894618076\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"228\" height=\"221\" src=\"https:\/\/nylon-granules.com\/wp-content\/uploads\/2024\/06\/Plastic-Yellowing.jpg\" class=\"attachment-large size-large\" alt=\"Plastiko pageltimas\" srcset=\"https:\/\/nylon-granules.com\/wp-content\/uploads\/2024\/06\/Plastic-Yellowing.jpg 228w, https:\/\/nylon-granules.com\/wp-content\/uploads\/2024\/06\/Plastic-Yellowing-12x12.jpg 12w\" sizes=\"auto, (max-width: 228px) 100vw, 228px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_894618076 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Degradation_of_the_Polymer_Chain\"><\/span><strong>Polimero grandin\u0117s irimas<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Plastiko geltonavimas pirmiausia atsiranda d\u0117l polimer\u0173 grandini\u0173 irimo. \u0160ios ilgos monomer\u0173 grandin\u0117s, tarpusavyje sujungtos kovalentiniais ry\u0161iais, yra jautrios aplinkos veiksniams, pavyzd\u017eiui, UV spinduliams, kar\u0161\u010diui ir deguoniui. Kai \u0161ios jungtys suyra, susidaro dvigubos jungtys ir kiti cheminiai poky\u010diai, tod\u0117l galiausiai molekul\u0117s tampa ma\u017eesn\u0117s. \u0160is procesas, vadinamas grandin\u0117s skilimu, ne tik pakei\u010dia plastiko chemin\u0119 strukt\u016br\u0105, bet ir suma\u017eina jo pirmines savybes.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Accumulation_of_Impurities_and_Additives\"><\/span><strong>Priemai\u0161\u0173 ir pried\u0173 kaupimasis<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Gamybos metu \u012f plastikus da\u017enai dedama toki\u0173 pried\u0173 kaip stabilizatoriai, da\u017eikliai ir u\u017epildai, kad pager\u0117t\u0173 j\u0173 eksploatacin\u0117s savyb\u0117s. Laikui b\u0117gant \u0161ie priedai gali migruoti \u012f plastiko pavir\u0161i\u0173 ir pakeisti spalv\u0105. Be to, tokios priemai\u0161os kaip dr\u0117gm\u0117 ir dulk\u0117s, susikaupusios polimero matricoje, gali sustiprinti geltonavimo proces\u0105.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Influence_of_Polymer_Type\"><\/span><strong>Polimero tipo \u012ftaka<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Plastiko jautrumas geltonavimui priklauso nuo naudojamo polimero tipo. Pavyzd\u017eiui, polietilenas ir polipropilenas d\u0117l skirtingos chemin\u0117s strukt\u016bros ir funkcini\u0173 grupi\u0173 yra labiau link\u0119 geltonuoti nei polistirenas ir polivinilchloridas.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Role_of_Catalysts\"><\/span><strong>Katalizatori\u0173 vaidmuo<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Katalizatoriai, pavyzd\u017eiui, metal\u0173 jonai ir peroksidai, gali pagreitinti plastiko geltonavim\u0105, nes palengvina grandin\u0117s skilim\u0105 ir skatina dvigub\u0173 ry\u0161i\u0173 susidarym\u0105. \u0160ie katalizatoriai didina skilimo greit\u012f ir taip pagreitina spalvos pasikeitimo proces\u0105.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong>I\u0161vada<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Plastiko geltonavimas yra daugialypis procesas, kuriam \u012ftakos turi keli veiksniai, \u012fskaitant polimero grandin\u0117s irim\u0105, pried\u0173 ir priemai\u0161\u0173 migracij\u0105, polimero tip\u0105 ir katalizatori\u0173 buvim\u0105. Suprasti \u0161i\u0105 dinamik\u0105 labai svarbu kuriant strategijas, kaip su\u0161velninti plastiko geltonavim\u0105 ir prailginti jo ilgaam\u017ei\u0161kum\u0105. Spr\u0119sdami \u0161i\u0173 veiksni\u0173 problem\u0105, taikydami geresnes med\u017eiagas ir aplinkosaugos vadybos praktik\u0105, galime padidinti ilgaam\u017ei\u0161kum\u0105 ir estetin\u012f patrauklum\u0105. <a href=\"https:\/\/nylon-granules.com\/lt\/products\/\">plastikiniai gaminiai<\/a>.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Summary_FAQ_on_Plastic_Yellowing\"><\/span><strong>DUK apie plastiko geltonavim\u0105<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>1. D\u0117l ko plastikas ilgainiui geltonuoja?<\/strong>\u00a0<\/p>\n<p>Plastikas geltonuoja pirmiausia d\u0117l polimer\u0173 grandini\u0173 irimo, kur\u012f lemia aplinkos veiksniai, pavyzd\u017eiui, UV spinduliai, kar\u0161tis ir deguonis. D\u0117l \u0161io irimo vyksta cheminiai plastiko poky\u010diai, \u012fskaitant dvigub\u0173 ry\u0161i\u0173 ir ma\u017eesni\u0173 molekuli\u0173 susidarym\u0105.<\/p>\n<p><strong>2.Kaip priedai prisideda prie plastiko pageltimo?<\/strong>\u00a0<\/p>\n<p>Gamybos proceso metu gamybos proceso metu dedami priedai, pvz., stabilizatoriai, da\u017eikliai ir u\u017epildai, siekiant pagerinti eksploatacines savybes, laikui b\u0117gant gali migruoti \u012f plastiko pavir\u0161i\u0173. \u0160i migracija gali lemti spalvos pasikeitim\u0105, ypa\u010d veikiant aplinkos veiksniams.<\/p>\n<p><strong>3. Kurios polimer\u0173 r\u016b\u0161ys yra jautresn\u0117s geltonavimui?<\/strong>\u00a0<\/p>\n<p>Polietilenas ir polipropilenas paprastai labiau link\u0119 geltonuoti, palyginti su tokiais polimerais kaip polistirenas ir polivinilchloridas. \u0160\u012f skirtum\u0105 lemia j\u0173 chemin\u0117s strukt\u016bros ir funkcini\u0173 grupi\u0173 skirtumai.<\/p>\n<p><strong>4. Kok\u012f vaidmen\u012f atlieka katalizatoriai, pagreitinantys plastiko geltonavim\u0105?<\/strong>\u00a0<\/p>\n<p>Katalizatoriai, pavyzd\u017eiui, metal\u0173 jonai ir peroksidai, gali pagreitinti plastiko irimo proces\u0105, skatindami grandin\u0117s skilim\u0105 ir dvigub\u0173 ry\u0161i\u0173 susidarym\u0105. Tai pagreitina plastiko spalvos pasikeitim\u0105 ir sutrumpina jo tarnavimo laik\u0105.<\/p>\n<p><strong>5. Kaip suma\u017einti plastiko geltonavim\u0105?<\/strong>\u00a0<\/p>\n<p>Suprasti veiksnius, kurie lemia plastiko geltonavim\u0105, pavyzd\u017eiui, kontroliuoti aplinkos poveik\u012f, pasirinkti tinkamus priedus ir ma\u017eiau jautrius polimerus, gali pad\u0117ti kuriant strategijas, kaip suma\u017einti geltonavim\u0105. Be to, tinkama sand\u0117liavimo ir prie\u017ei\u016bros praktika taip pat gali pailginti plastikini\u0173 gamini\u0173 tarnavimo laik\u0105.<\/p>\n<p>\u00a0<\/p>","protected":false},"excerpt":{"rendered":"<p>Degradation of the Polymer Chain Plastic yellowing primarily stems from the degradation of polymer chains. These long chains of monomers, interconnected by covalent bonds, are susceptible to environmental stressors like UV radiation, heat, and oxygen. As these bonds break down, they form double bonds and other chemical alterations, ultimately resulting in smaller molecules. This process, [\u2026]","protected":false},"author":1,"featured_media":2718,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2716","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/nylon-granules.com\/lt\/wp-json\/wp\/v2\/posts\/2716","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nylon-granules.com\/lt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nylon-granules.com\/lt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nylon-granules.com\/lt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nylon-granules.com\/lt\/wp-json\/wp\/v2\/comments?post=2716"}],"version-history":[{"count":2,"href":"https:\/\/nylon-granules.com\/lt\/wp-json\/wp\/v2\/posts\/2716\/revisions"}],"predecessor-version":[{"id":2719,"href":"https:\/\/nylon-granules.com\/lt\/wp-json\/wp\/v2\/posts\/2716\/revisions\/2719"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nylon-granules.com\/lt\/wp-json\/wp\/v2\/media\/2718"}],"wp:attachment":[{"href":"https:\/\/nylon-granules.com\/lt\/wp-json\/wp\/v2\/media?parent=2716"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nylon-granules.com\/lt\/wp-json\/wp\/v2\/categories?post=2716"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nylon-granules.com\/lt\/wp-json\/wp\/v2\/tags?post=2716"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}