{"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\/sk\/the-science-behind-plastic-yellowing\/","title":{"rendered":"Veda o \u017eltnut\u00ed plastov"},"content":{"rendered":"<div class=\"row\"  id=\"row-1830990482\">\n\n\t<div id=\"col-729435179\" 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\">Obsah<\/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=\"Prep\u00ednanie tabu\u013eky obsahu\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Prep\u00edna\u010d<\/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\/sk\/the-science-behind-plastic-yellowing\/#Introduction_of_Plastic_Yellowing\" >Zavedenie \u017eltnutia plastov\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\/sk\/the-science-behind-plastic-yellowing\/#Degradation_of_the_Polymer_Chain\" >Degrad\u00e1cia polym\u00e9rneho re\u0165azca<\/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\/sk\/the-science-behind-plastic-yellowing\/#Accumulation_of_Impurities_and_Additives\" >Hromadenie ne\u010dist\u00f4t a pr\u00edsad<\/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\/sk\/the-science-behind-plastic-yellowing\/#Influence_of_Polymer_Type\" >Vplyv typu polym\u00e9ru<\/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\/sk\/the-science-behind-plastic-yellowing\/#Role_of_Catalysts\" >\u00daloha katalyz\u00e1torov<\/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\/sk\/the-science-behind-plastic-yellowing\/#Conclusion\" >Z\u00e1ver<\/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\/sk\/the-science-behind-plastic-yellowing\/#Summary_FAQ_on_Plastic_Yellowing\" >S\u00fahrnn\u00e9 FAQ o \u017eltnut\u00ed plastov<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Introduction_of_Plastic_Yellowing\"><\/span><strong>Zavedenie \u017eltnutia plastov\u00a0<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u017dltnutie plastov je roz\u0161\u00edren\u00fd probl\u00e9m, ktor\u00fd postihuje mnoh\u00e9 polym\u00e9rne materi\u00e1ly a \u010dasto vedie k zhor\u0161eniu mechanick\u00fdch vlastnost\u00ed a skr\u00e1teniu \u017eivotnosti. Tento \u010dl\u00e1nok sa zaober\u00e1 vedeck\u00fdmi vysvetleniami tohto javu a sk\u00fama k\u013e\u00fa\u010dov\u00e9 faktory, ktor\u00e9 prispievaj\u00fa k zmene farby plastov.<\/p>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n\n\t<div id=\"col-195963014\" 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_435748668\">\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=\"\u017dltnutie plastov\" 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_435748668 {\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>Degrad\u00e1cia polym\u00e9rneho re\u0165azca<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u017dltnutie plastov je predov\u0161etk\u00fdm d\u00f4sledkom degrad\u00e1cie polym\u00e9rnych re\u0165azcov. Tieto dlh\u00e9 re\u0165azce monom\u00e9rov prepojen\u00e9 kovalentn\u00fdmi v\u00e4zbami s\u00fa citliv\u00e9 na stresov\u00e9 faktory prostredia, ako je UV \u017eiarenie, teplo a kysl\u00edk. Pri rozpade t\u00fdchto v\u00e4zieb vznikaj\u00fa dvojit\u00e9 v\u00e4zby a in\u00e9 chemick\u00e9 zmeny, \u010do v kone\u010dnom d\u00f4sledku vedie k zmen\u0161eniu molek\u00fal. Tento proces, zn\u00e1my ako \u0161tiepenie re\u0165azca, nielen\u017ee men\u00ed chemick\u00fa \u0161trukt\u00faru plastu, ale zni\u017euje aj jeho p\u00f4vodn\u00e9 vlastnosti.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Accumulation_of_Impurities_and_Additives\"><\/span><strong>Hromadenie ne\u010dist\u00f4t a pr\u00edsad<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Do plastov sa po\u010das v\u00fdroby \u010dasto prid\u00e1vaj\u00fa pr\u00edsady, ako s\u00fa stabiliz\u00e1tory, farbiv\u00e1 a plniv\u00e1, aby sa zlep\u0161ili ich vlastnosti. Tieto pr\u00edsady m\u00f4\u017eu \u010dasom migrova\u0165 na povrch plastu a prispieva\u0165 k zmene farby. Okrem toho ne\u010distoty, ako je vlhkos\u0165 a prach, m\u00f4\u017eu zhor\u0161i\u0165 proces \u017eltnutia t\u00fdm, \u017ee sa hromadia v polym\u00e9rnej matrici.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Influence_of_Polymer_Type\"><\/span><strong>Vplyv typu polym\u00e9ru<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>N\u00e1chylnos\u0165 plastov na \u017eltnutie sa l\u00ed\u0161i v z\u00e1vislosti od typu pou\u017eit\u00e9ho polym\u00e9ru. Napr\u00edklad polyetyl\u00e9n a polypropyl\u00e9n s\u00fa n\u00e1chylnej\u0161ie na \u017eltnutie v porovnan\u00ed s polystyr\u00e9nom a polyvinylchloridom v d\u00f4sledku rozdielov v ich chemick\u00fdch \u0161trukt\u00farach a funk\u010dn\u00fdch skupin\u00e1ch.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Role_of_Catalysts\"><\/span><strong>\u00daloha katalyz\u00e1torov<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Katalyz\u00e1tory, ako s\u00fa i\u00f3ny kovov a peroxidy, m\u00f4\u017eu ur\u00fdchli\u0165 \u017eltnutie plastov t\u00fdm, \u017ee u\u013eah\u010duj\u00fa \u0161tiepenie re\u0165azca a podporuj\u00fa tvorbu dvojit\u00fdch v\u00e4zieb. Tieto katalyz\u00e1tory zvy\u0161uj\u00fa r\u00fdchlos\u0165 degrad\u00e1cie, \u010d\u00edm ur\u00fdch\u013euj\u00fa proces odfarbovania.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong>Z\u00e1ver<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u017dltnutie plastov je mnohostrann\u00fd proces, ktor\u00fd ovplyv\u0148uje nieko\u013eko faktorov vr\u00e1tane degrad\u00e1cie polym\u00e9rneho re\u0165azca, migr\u00e1cie pr\u00edsad a ne\u010dist\u00f4t, typu polym\u00e9ru a pr\u00edtomnosti katalyz\u00e1torov. Pochopenie tejto dynamiky je k\u013e\u00fa\u010dov\u00e9 pre v\u00fdvoj strat\u00e9gi\u00ed na zmiernenie \u017eltnutia plastov a pred\u013a\u017eenie ich \u017eivotnosti. Rie\u0161en\u00edm t\u00fdchto faktorov prostredn\u00edctvom zlep\u0161en\u00fdch materi\u00e1lov a postupov environment\u00e1lneho riadenia m\u00f4\u017eeme zv\u00fd\u0161i\u0165 \u017eivotnos\u0165 a estetick\u00fa pr\u00ed\u0165a\u017elivos\u0165 <a href=\"https:\/\/nylon-granules.com\/sk\/products\/\">plastov\u00e9 v\u00fdrobky<\/a>.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Summary_FAQ_on_Plastic_Yellowing\"><\/span><strong>S\u00fahrnn\u00e9 FAQ o \u017eltnut\u00ed plastov<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>1. \u010co sp\u00f4sobuje, \u017ee plast \u010dasom zo\u017eltne?<\/strong>\u00a0<\/p>\n<p>\u017dltnutie plastov je sp\u00f4soben\u00e9 predov\u0161etk\u00fdm degrad\u00e1ciou polym\u00e9rnych re\u0165azcov vplyvom faktorov prostredia, ako je UV \u017eiarenie, teplo a kysl\u00edk. T\u00e1to degrad\u00e1cia vedie k chemick\u00fdm zmen\u00e1m v plaste vr\u00e1tane tvorby dvojit\u00fdch v\u00e4zieb a men\u0161\u00edch molek\u00fal.<\/p>\n<p><strong>2.Ako prispievaj\u00fa adit\u00edva k \u017eltnutiu plastov?<\/strong>\u00a0<\/p>\n<p>Pr\u00edsady, ako s\u00fa stabiliz\u00e1tory, farbiv\u00e1 a plniv\u00e1, ktor\u00e9 sa prid\u00e1vaj\u00fa po\u010das v\u00fdrobn\u00e9ho procesu na zlep\u0161enie vlastnost\u00ed, m\u00f4\u017eu \u010dasom migrova\u0165 na povrch plastu. T\u00e1to migr\u00e1cia m\u00f4\u017ee prispie\u0165 k zmene farby, najm\u00e4 ak s\u00fa vystaven\u00e9 stresov\u00fdm faktorom prostredia.<\/p>\n<p><strong>3. Ktor\u00e9 typy polym\u00e9rov s\u00fa n\u00e1chylnej\u0161ie na \u017eltnutie?<\/strong>\u00a0<\/p>\n<p>Polyetyl\u00e9n a polypropyl\u00e9n s\u00fa vo v\u0161eobecnosti n\u00e1chylnej\u0161ie na \u017eltnutie v porovnan\u00ed s polym\u00e9rmi, ako s\u00fa polystyr\u00e9n a polyvinylchlorid. Tento rozdiel sa pripisuje rozdielom v ich chemick\u00fdch \u0161trukt\u00farach a funk\u010dn\u00fdch skupin\u00e1ch.<\/p>\n<p><strong>4. Ak\u00fa \u00falohu zohr\u00e1vaj\u00fa katalyz\u00e1tory pri ur\u00fdch\u013eovan\u00ed \u017eltnutia plastov?<\/strong>\u00a0<\/p>\n<p>Katalyz\u00e1tory, ako s\u00fa i\u00f3ny kovov a peroxidy, m\u00f4\u017eu ur\u00fdchli\u0165 proces degrad\u00e1cie plastov t\u00fdm, \u017ee podporuj\u00fa \u0161tiepenie re\u0165azcov a tvorbu dvojit\u00fdch v\u00e4zieb. T\u00fdm sa ur\u00fdch\u013euje zmena farby plastu a skracuje sa jeho \u017eivotnos\u0165.<\/p>\n<p><strong>5. Ako mo\u017eno minimalizova\u0165 \u017eltnutie plastov?<\/strong>\u00a0<\/p>\n<p>Pochopenie faktorov, ktor\u00e9 prispievaj\u00fa k \u017eltnutiu plastov - ako je kontrola vystavenia vplyvu prostredia, v\u00fdber vhodn\u00fdch pr\u00edsad a v\u00fdber menej n\u00e1chyln\u00fdch polym\u00e9rov - m\u00f4\u017ee pom\u00f4c\u0165 pri v\u00fdvoji strat\u00e9gi\u00ed na minimaliz\u00e1ciu \u017eltnutia. Okrem toho m\u00f4\u017eu \u017eivotnos\u0165 plastov\u00fdch v\u00fdrobkov pred\u013a\u017ei\u0165 aj spr\u00e1vne postupy skladovania a \u00fadr\u017eby.<\/p>\n<p>\u00a0<\/p>","protected":false},"excerpt":{"rendered":"<p>Degrad\u00e1cia polym\u00e9rneho re\u0165azca \u017dltnutie plastov je predov\u0161etk\u00fdm d\u00f4sledkom degrad\u00e1cie polym\u00e9rnych re\u0165azcov. Tieto dlh\u00e9 re\u0165azce monom\u00e9rov prepojen\u00e9 kovalentn\u00fdmi v\u00e4zbami s\u00fa citliv\u00e9 na stresov\u00e9 faktory prostredia, ako je UV \u017eiarenie, teplo a kysl\u00edk. Pri rozpade t\u00fdchto v\u00e4zieb vznikaj\u00fa dvojit\u00e9 v\u00e4zby a in\u00e9 chemick\u00e9 zmeny, \u010do v kone\u010dnom d\u00f4sledku vedie k zmen\u0161eniu molek\u00fal. Tento proces, [...]","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\/sk\/wp-json\/wp\/v2\/posts\/2716","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nylon-granules.com\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nylon-granules.com\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nylon-granules.com\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nylon-granules.com\/sk\/wp-json\/wp\/v2\/comments?post=2716"}],"version-history":[{"count":2,"href":"https:\/\/nylon-granules.com\/sk\/wp-json\/wp\/v2\/posts\/2716\/revisions"}],"predecessor-version":[{"id":2719,"href":"https:\/\/nylon-granules.com\/sk\/wp-json\/wp\/v2\/posts\/2716\/revisions\/2719"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nylon-granules.com\/sk\/wp-json\/wp\/v2\/media\/2718"}],"wp:attachment":[{"href":"https:\/\/nylon-granules.com\/sk\/wp-json\/wp\/v2\/media?parent=2716"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nylon-granules.com\/sk\/wp-json\/wp\/v2\/categories?post=2716"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nylon-granules.com\/sk\/wp-json\/wp\/v2\/tags?post=2716"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}