{"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\/cs\/the-science-behind-plastic-yellowing\/","title":{"rendered":"V\u011bda o \u017eloutnut\u00ed plast\u016f"},"content":{"rendered":"<div class=\"row\"  id=\"row-64904744\">\n\n\t<div id=\"col-597031646\" 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=\"P\u0159epnut\u00ed tabulky obsahu\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">P\u0159ep\u00edn\u00e1n\u00ed<\/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\/cs\/the-science-behind-plastic-yellowing\/#Introduction_of_Plastic_Yellowing\" >Zaveden\u00ed \u017eloutnut\u00ed plast\u016f\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\/cs\/the-science-behind-plastic-yellowing\/#Degradation_of_the_Polymer_Chain\" >Degradace polymern\u00edho \u0159et\u011bzce<\/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\/cs\/the-science-behind-plastic-yellowing\/#Accumulation_of_Impurities_and_Additives\" >Hromad\u011bn\u00ed ne\u010distot a p\u0159\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\/cs\/the-science-behind-plastic-yellowing\/#Influence_of_Polymer_Type\" >Vliv typu polymeru<\/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\/cs\/the-science-behind-plastic-yellowing\/#Role_of_Catalysts\" >\u00daloha katalyz\u00e1tor\u016f<\/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\/cs\/the-science-behind-plastic-yellowing\/#Conclusion\" >Z\u00e1v\u011br<\/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\/cs\/the-science-behind-plastic-yellowing\/#Summary_FAQ_on_Plastic_Yellowing\" >Souhrnn\u00e9 FAQ o \u017eloutnut\u00ed plast\u016f<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Introduction_of_Plastic_Yellowing\"><\/span><strong>Zaveden\u00ed \u017eloutnut\u00ed plast\u016f\u00a0<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u017dloutnut\u00ed plast\u016f je roz\u0161\u00ed\u0159en\u00fdm probl\u00e9mem mnoha polymern\u00edch materi\u00e1l\u016f, kter\u00fd \u010dasto vede ke zhor\u0161en\u00ed mechanick\u00fdch vlastnost\u00ed a zkr\u00e1cen\u00ed \u017eivotnosti. Tento \u010dl\u00e1nek se zab\u00fdv\u00e1 v\u011bdeck\u00fdm vysv\u011btlen\u00edm tohoto jevu a zkoum\u00e1 kl\u00ed\u010dov\u00e9 faktory, kter\u00e9 p\u0159isp\u00edvaj\u00ed ke zm\u011bn\u011b barvy plast\u016f.<\/p>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n\n\t<div id=\"col-1348113714\" 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_1270562072\">\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=\"\u017dloutnut\u00ed plast\u016f\" 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_1270562072 {\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>Degradace polymern\u00edho \u0159et\u011bzce<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u017dloutnut\u00ed plast\u016f je prim\u00e1rn\u011b zp\u016fsobeno degradac\u00ed polymern\u00edch \u0159et\u011bzc\u016f. Tyto dlouh\u00e9 \u0159et\u011bzce monomer\u016f, propojen\u00e9 kovalentn\u00edmi vazbami, jsou n\u00e1chyln\u00e9 k p\u016fsoben\u00ed stresov\u00fdch faktor\u016f prost\u0159ed\u00ed, jako je UV z\u00e1\u0159en\u00ed, teplo a kysl\u00edk. P\u0159i rozpadu t\u011bchto vazeb vznikaj\u00ed dvojn\u00e9 vazby a dal\u0161\u00ed chemick\u00e9 zm\u011bny, kter\u00e9 nakonec vedou ke vzniku men\u0161\u00edch molekul. Tento proces, zn\u00e1m\u00fd jako \u0161t\u011bpen\u00ed \u0159et\u011bzc\u016f, nejen\u017ee m\u011bn\u00ed chemickou strukturu plastu, ale tak\u00e9 sni\u017euje jeho p\u016fvodn\u00ed vlastnosti.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Accumulation_of_Impurities_and_Additives\"><\/span><strong>Hromad\u011bn\u00ed ne\u010distot a p\u0159\u00edsad<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>P\u0159i v\u00fdrob\u011b se do plast\u016f \u010dasto p\u0159id\u00e1vaj\u00ed aditiva, jako jsou stabiliz\u00e1tory, barviva a plniva, kter\u00e1 zlep\u0161uj\u00ed jejich vlastnosti. \u010casem mohou tato aditiva migrovat na povrch plastu a p\u0159isp\u00edvat ke zm\u011bn\u011b barvy. Krom\u011b toho mohou ne\u010distoty, jako je vlhkost a prach, zhor\u0161ovat proces \u017eloutnut\u00ed t\u00edm, \u017ee se hromad\u00ed v polymern\u00ed matrici.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Influence_of_Polymer_Type\"><\/span><strong>Vliv typu polymeru<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>N\u00e1chylnost plast\u016f ke \u017eloutnut\u00ed se li\u0161\u00ed v z\u00e1vislosti na typu pou\u017eit\u00e9ho polymeru. Nap\u0159\u00edklad polyethylen a polypropylen jsou n\u00e1chyln\u011bj\u0161\u00ed ke \u017eloutnut\u00ed ve srovn\u00e1n\u00ed s polystyrenem a polyvinylchloridem kv\u016fli rozd\u00edl\u016fm v jejich chemick\u00e9 struktu\u0159e a funk\u010dn\u00edch skupin\u00e1ch.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Role_of_Catalysts\"><\/span><strong>\u00daloha katalyz\u00e1tor\u016f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Katalyz\u00e1tory, jako jsou ionty kov\u016f a peroxidy, mohou urychlit \u017eloutnut\u00ed plast\u016f t\u00edm, \u017ee usnad\u0148uj\u00ed \u0161t\u011bpen\u00ed \u0159et\u011bzc\u016f a podporuj\u00ed tvorbu dvojn\u00fdch vazeb. Tyto katalyz\u00e1tory zvy\u0161uj\u00ed rychlost rozkladu, a t\u00edm urychluj\u00ed proces odbarvov\u00e1n\u00ed.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong>Z\u00e1v\u011br<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u017dloutnut\u00ed plast\u016f je mnohostrann\u00fd proces, kter\u00fd ovliv\u0148uje n\u011bkolik faktor\u016f v\u010detn\u011b degradace polymern\u00edho \u0159et\u011bzce, migrace p\u0159\u00edsad a ne\u010distot, typu polymeru a p\u0159\u00edtomnosti katalyz\u00e1tor\u016f. Pochopen\u00ed t\u00e9to dynamiky je z\u00e1sadn\u00ed pro v\u00fdvoj strategi\u00ed, kter\u00e9 zm\u00edr\u0148uj\u00ed \u017eloutnut\u00ed plast\u016f a prodlu\u017euj\u00ed jejich \u017eivotnost. \u0158e\u0161en\u00edm t\u011bchto faktor\u016f prost\u0159ednictv\u00edm zdokonalen\u00fdch materi\u00e1l\u016f a postup\u016f environment\u00e1ln\u00edho \u0159\u00edzen\u00ed m\u016f\u017eeme zv\u00fd\u0161it trvanlivost a estetick\u00fd vzhled <a href=\"https:\/\/nylon-granules.com\/cs\/products\/\">plastov\u00e9 v\u00fdrobky<\/a>.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Summary_FAQ_on_Plastic_Yellowing\"><\/span><strong>Souhrnn\u00e9 FAQ o \u017eloutnut\u00ed plast\u016f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>1. Co zp\u016fsobuje, \u017ee plast \u010dasem \u017eloutne?<\/strong>\u00a0<\/p>\n<p>\u017dloutnut\u00ed plast\u016f je zp\u016fsobeno p\u0159edev\u0161\u00edm degradac\u00ed polymern\u00edch \u0159et\u011bzc\u016f vlivem okoln\u00edch faktor\u016f, jako je UV z\u00e1\u0159en\u00ed, teplo a kysl\u00edk. Tato degradace vede k chemick\u00fdm zm\u011bn\u00e1m v plastu, v\u010detn\u011b vzniku dvojn\u00fdch vazeb a men\u0161\u00edch molekul.<\/p>\n<p><strong>2.Jak p\u0159isp\u00edvaj\u00ed aditiva ke \u017eloutnut\u00ed plast\u016f?<\/strong>\u00a0<\/p>\n<p>P\u0159\u00edsady, jako jsou stabiliz\u00e1tory, barviva a plniva, kter\u00e9 se p\u0159id\u00e1vaj\u00ed b\u011bhem v\u00fdrobn\u00edho procesu za \u00fa\u010delem zlep\u0161en\u00ed vlastnost\u00ed, mohou \u010dasem migrovat na povrch plastu. Tato migrace m\u016f\u017ee p\u0159isp\u00edvat ke zm\u011bn\u011b barvy, zejm\u00e9na pokud je vystaven vliv\u016fm prost\u0159ed\u00ed.<\/p>\n<p><strong>3. Kter\u00e9 typy polymer\u016f jsou n\u00e1chyln\u011bj\u0161\u00ed ke \u017eloutnut\u00ed?<\/strong>\u00a0<\/p>\n<p>Polyethylen a polypropylen jsou obecn\u011b n\u00e1chyln\u011bj\u0161\u00ed ke \u017eloutnut\u00ed ve srovn\u00e1n\u00ed s polymery, jako je polystyren a polyvinylchlorid. Tento rozd\u00edl je d\u00e1n rozd\u00edly v jejich chemick\u00e9 struktu\u0159e a funk\u010dn\u00edch skupin\u00e1ch.<\/p>\n<p><strong>4. Jakou roli hraj\u00ed katalyz\u00e1tory p\u0159i urychlov\u00e1n\u00ed \u017eloutnut\u00ed plast\u016f?<\/strong>\u00a0<\/p>\n<p>Katalyz\u00e1tory, jako jsou ionty kov\u016f a peroxidy, mohou urychlit proces degradace plast\u016f t\u00edm, \u017ee podporuj\u00ed \u0161t\u011bpen\u00ed \u0159et\u011bzc\u016f a tvorbu dvojn\u00fdch vazeb. To urychluje zm\u011bnu barvy plastu a zkracuje jeho \u017eivotnost.<\/p>\n<p><strong>5. Jak lze minimalizovat \u017eloutnut\u00ed plast\u016f?<\/strong>\u00a0<\/p>\n<p>Pochopen\u00ed faktor\u016f, kter\u00e9 p\u0159isp\u00edvaj\u00ed ke \u017eloutnut\u00ed plast\u016f - jako je kontrola expozice prost\u0159ed\u00ed, v\u00fdb\u011br vhodn\u00fdch aditiv a v\u00fdb\u011br m\u00e9n\u011b n\u00e1chyln\u00fdch polymer\u016f - m\u016f\u017ee pomoci p\u0159i v\u00fdvoji strategi\u00ed pro minimalizaci \u017eloutnut\u00ed. Krom\u011b toho mohou \u017eivotnost plastov\u00fdch v\u00fdrobk\u016f prodlou\u017eit tak\u00e9 spr\u00e1vn\u00e9 postupy skladov\u00e1n\u00ed a \u00fadr\u017eby.<\/p>\n<p>\u00a0<\/p>","protected":false},"excerpt":{"rendered":"<p>Degradace polymern\u00edho \u0159et\u011bzce \u017dloutnut\u00ed plast\u016f je prim\u00e1rn\u011b zp\u016fsobeno degradac\u00ed polymern\u00edch \u0159et\u011bzc\u016f. Tyto dlouh\u00e9 \u0159et\u011bzce monomer\u016f, propojen\u00e9 kovalentn\u00edmi vazbami, jsou n\u00e1chyln\u00e9 na stresov\u00e9 faktory prost\u0159ed\u00ed, jako je UV z\u00e1\u0159en\u00ed, teplo a kysl\u00edk. P\u0159i rozpadu t\u011bchto vazeb vznikaj\u00ed dvojn\u00e9 vazby a dal\u0161\u00ed chemick\u00e9 zm\u011bny, kter\u00e9 nakonec vedou ke vzniku men\u0161\u00edch molekul. 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\/cs\/wp-json\/wp\/v2\/posts\/2716","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nylon-granules.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nylon-granules.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nylon-granules.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nylon-granules.com\/cs\/wp-json\/wp\/v2\/comments?post=2716"}],"version-history":[{"count":2,"href":"https:\/\/nylon-granules.com\/cs\/wp-json\/wp\/v2\/posts\/2716\/revisions"}],"predecessor-version":[{"id":2719,"href":"https:\/\/nylon-granules.com\/cs\/wp-json\/wp\/v2\/posts\/2716\/revisions\/2719"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nylon-granules.com\/cs\/wp-json\/wp\/v2\/media\/2718"}],"wp:attachment":[{"href":"https:\/\/nylon-granules.com\/cs\/wp-json\/wp\/v2\/media?parent=2716"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nylon-granules.com\/cs\/wp-json\/wp\/v2\/categories?post=2716"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nylon-granules.com\/cs\/wp-json\/wp\/v2\/tags?post=2716"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}