{"id":5406,"date":"2022-07-24T05:44:35","date_gmt":"2022-07-24T05:44:35","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=5406"},"modified":"2026-04-28T10:42:05","modified_gmt":"2026-04-28T10:42:05","slug":"brief-description-of-the-role-of-antioxidants-in-plastics-and-their-selection-principles","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/fr\/brief-description-of-the-role-of-antioxidants-in-plastics-and-their-selection-principles\/","title":{"rendered":"Br\u00e8ve description du r\u00f4le des antioxydants dans les mati\u00e8res plastiques et de leurs principes de s\u00e9lection"},"content":{"rendered":"<h1><strong>Br\u00e8ve description du r\u00f4le des antioxydants dans les mati\u00e8res plastiques et de leurs principes de s\u00e9lection<\/strong><\/h1>\n<p><!-- lc-qa-start --><\/p>\n<p><strong>R\u00e9ponse rapide :<\/strong> A practical stabilization strategy starts with the degradation risk first, then screens the additive package around processing conditions, service life, and appearance requirements.<\/p>\n<p><!-- lc-qa-end --><\/p>\n<p>For general plastics stabilization, buyers often compare <a href=\"https:\/\/longchangchemical.com\/fr\/product\/chlumiao-1010-cas-6683-19-8\/\">Antioxydant 1010<\/a> as a primary phenolic antioxidant with <a href=\"https:\/\/longchangchemical.com\/fr\/product\/chlumiao-168-cas-31570-04-4\/\">Antioxidant 168<\/a> as a phosphite processing stabilizer.<\/p>\n<p>L'ajout d'antioxydants appropri\u00e9s lors de la transformation des mati\u00e8res plastiques peut arr\u00eater ou retarder le processus de vieillissement, prolongeant ainsi la dur\u00e9e de vie des produits en plastique. Le choix des antioxydants doit se faire en fonction du type de plastique, de l'\u00e9quipement de transformation, des conditions de traitement, de la vari\u00e9t\u00e9 des autres additifs et de la quantit\u00e9 ajout\u00e9e, de l'environnement dans lequel le produit est utilis\u00e9 et de la dur\u00e9e de vie du produit. Le choix des antioxydants pour les mati\u00e8res plastiques doit se fonder sur les principes suivants.<\/p>\n<p>I. Compatibilit\u00e9. La compatibilit\u00e9 entre les polym\u00e8res plastiques et les antioxydants est souvent m\u00e9diocre ; en g\u00e9n\u00e9ral, \u00e0 haute temp\u00e9rature, l'antioxydant et le polym\u00e8re fondent ensemble ; le durcissement du polym\u00e8re est compatible avec les mol\u00e9cules d'antioxydant qui se trouvent au milieu des mol\u00e9cules de polym\u00e8re. Dans la plage de dosage de la formulation, l'antioxydant doit \u00eatre fondu \u00e0 la temp\u00e9rature de traitement. Lors de la conception des formulations, le choix des antioxydants solides, des stabilisateurs de lumi\u00e8re, du point de fusion ou de la plage de fusion de la limite sup\u00e9rieure, ne doit pas \u00eatre sup\u00e9rieur \u00e0 la temp\u00e9rature de transformation des polym\u00e8res plastiques.<\/p>\n<p>Deuxi\u00e8mement, la migration. Les produits en plastique, en particulier la surface et le rapport de volume (ou le rapport de masse) de la plus petite valeur du produit, l'oxydation se produit principalement sur la surface du produit, ce qui n\u00e9cessite une migration continue des antioxydants des produits en plastique vers la surface du produit et joue un r\u00f4le. Toutefois, si la vitesse de migration vers la surface du produit est trop rapide, la quantit\u00e9 de migration est trop importante, l'antioxydant doit \u00eatre volatile \u00e0 la surface du produit dans l'environnement, ou l'agent de diffusion et le contact de la surface du produit avec d'autres milieux et la perte, cette perte est en fait in\u00e9vitable, les formulations de conception \u00e0 prendre en compte. Lorsqu'il y a un choix de vari\u00e9t\u00e9s d'antioxydants, il faut choisir un poids mol\u00e9culaire relativement \u00e9lev\u00e9, un point de fusion appropri\u00e9 \u00e0 des esp\u00e8ces \u00e9lev\u00e9es, et \u00e0 l'utilisation la plus s\u00e9v\u00e8re de l'environnement pour d\u00e9terminer la quantit\u00e9 d'antioxydant \u00e0 utiliser.<\/p>\n<p>Troisi\u00e8mement, la stabilit\u00e9. L'antioxydant dans les mati\u00e8res plastiques doit rester stable, dans l'utilisation de l'environnement et le traitement \u00e0 haute temp\u00e9rature perte volatile, pas de d\u00e9coloration ou de couleur, pas de d\u00e9composition (en plus du r\u00f4le des antioxydants pour la stabilisation de la chaleur de traitement), pas avec d'autres additifs r\u00e9actions chimiques d\u00e9favorables, pas corrosif machines et \u00e9quipements, pas facilement extrait par d'autres substances sur la surface du produit.<\/p>\n<p>Quatri\u00e8mement, la facilit\u00e9 de traitement. Lors de la transformation des produits en plastique, l'ajout d'antioxydants peut modifier la viscosit\u00e9 de la r\u00e9sine et le couple de serrage de la vis. Si la diff\u00e9rence entre l'antioxydant et la plage de fusion de la r\u00e9sine est importante, le flux de l'antioxydant sera biais\u00e9 ou le ph\u00e9nom\u00e8ne d'inhibition de la vis se produira. Le point de fusion de l'antioxydant \u00e9tant inf\u00e9rieur \u00e0 la temp\u00e9rature de traitement de 100 \u2103 ou plus, l'antioxydant doit d'abord \u00eatre transform\u00e9 en un certain lot principal, puis m\u00e9lang\u00e9 aux produits de traitement de la r\u00e9sine, afin d'\u00e9viter une distribution in\u00e9gale de l'antioxydant dans le produit en raison d'un flux de biais et d'une baisse du rendement du traitement.<\/p>\n<p>Cinqui\u00e8mement, l'environnement et la sant\u00e9. L'antioxydant doit \u00eatre non toxique ou faiblement toxique, non poussi\u00e9reux ou faiblement poussi\u00e9reux, ne pas avoir d'effets nocifs sur le corps humain lors de la transformation et de l'utilisation des produits en plastique, ne pas nuire aux animaux et aux plantes, ne pas polluer l'air, le sol et l'eau.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><!-- lc-commercial-start --><\/p>\n<h2>Un guide pratique pour la s\u00e9lection des emballages antioxydants, absorbeurs d&#039;UV et HALS<\/h2>\n<p>La plupart des d\u00e9cisions concernant les stabilisateurs sont plus pertinentes lorsqu&#039;elles sont envisag\u00e9es dans le cadre d&#039;un ensemble de solutions plut\u00f4t que pour un produit individuel. Les acheteurs techniques parviennent g\u00e9n\u00e9ralement \u00e0 la r\u00e9ponse la plus convaincante en examinant conjointement le vieillissement thermique \u00e0 long terme, la stabilit\u00e9 du proc\u00e9d\u00e9, la r\u00e9sistance aux intemp\u00e9ries et la sensibilit\u00e9 \u00e0 la couleur.<\/p>\n<ul>\n<li><strong>Distinguer la protection du traitement de la stabilit\u00e9 \u00e0 long terme\u00a0:<\/strong> Le meilleur additif pour l&#039;historique de fusion n&#039;est pas toujours celui qui offre la meilleure dur\u00e9e de vie.<\/li>\n<li><strong>Utilisez la synergie de mani\u00e8re d\u00e9lib\u00e9r\u00e9e\u00a0:<\/strong> De nombreux syst\u00e8mes polym\u00e8res et de rev\u00eatements fonctionnent de mani\u00e8re optimale lorsque les stabilisateurs primaires et secondaires sont intentionnellement associ\u00e9s.<\/li>\n<li><strong>V\u00e9rifier les exigences en mati\u00e8re de couleur et de nettet\u00e9\u00a0:<\/strong> Les syst\u00e8mes transparents, p\u00e2les, destin\u00e9s au contact alimentaire ou blancs n\u00e9cessitent souvent un emballage plus compact que les produits industriels fonc\u00e9s.<\/li>\n<li><strong>V\u00e9rifier l&#039;\u00e9tat de vieillissement r\u00e9el\u00a0:<\/strong> La chaleur, les UV, l&#039;humidit\u00e9 et l&#039;exposition aux intemp\u00e9ries peuvent chacun modifier la m\u00e9thode de stabilisation commercialement la plus efficace.<\/li>\n<\/ul>\n<h3>R\u00e9f\u00e9rences de produits recommand\u00e9es<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/chlumiao-1010-cas-6683-19-8\/\">CHLUMIAO 1010<\/a>:<\/strong> Un antioxydant primaire de r\u00e9f\u00e9rence largement utilis\u00e9 pour la stabilit\u00e9 thermique \u00e0 long terme.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/chlumiao-168-cas-31570-04-4\/\">CHLUMIAO 168<\/a>:<\/strong> Un r\u00e9f\u00e9rence pratique de stabilit\u00e9 du proc\u00e9d\u00e9 lorsque le contr\u00f4le de l'hydroperoxyde est important.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/light-stabilizer-123-tinuvin-123-cas-129757-67-1\/\">CHLUMILS UV-123<\/a>:<\/strong> Une r\u00e9f\u00e9rence HALS solide pour les \u00e9crans ax\u00e9s sur la r\u00e9sistance aux intemp\u00e9ries dans les rev\u00eatements et les polym\u00e8res.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/uv-5151-cas-104810-48-2\/\">CHLUMILS UV-5151<\/a>:<\/strong> A practical stabilizer-package reference when broader light-aging protection is needed.<\/li>\n<\/ul>\n<h3>FAQ pour les acheteurs et les formulateurs<\/h3>\n<p><strong>Pourquoi les ensembles de stabilisateurs sont-ils souvent plus efficaces qu&#039;un additif seul\u00a0?<\/strong><br \/>\u00c9tant donn\u00e9 que diff\u00e9rents produits peuvent prot\u00e9ger diff\u00e9rentes parties du processus de d\u00e9gradation, l&#039;ensemble couvre souvent un plus grand nombre de risques qu&#039;un seul niveau de d\u00e9gradation.<\/p>\n<p><strong>L&#039;ajout d&#039;antioxydants ou de stabilisateurs UV am\u00e9liore-t-il toujours les performances\u00a0?<\/strong><br \/>Pas n\u00e9cessairement. Un surdosage peut augmenter les co\u00fbts et parfois engendrer des effets secondaires\u00a0; la plupart des syst\u00e8mes fonctionnent donc de mani\u00e8re optimale dans une plage de dosage test\u00e9e.<\/p>\n<p><!-- lc-commercial-end --><\/p>","protected":false},"excerpt":{"rendered":"<p>The addition of suitable antioxidants in plastic processing can stop or delay the ageing process, thus extending the service life of plastic products. The selection of antioxidants should be based<\/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-5406","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>Brief description of the role of antioxidants in plastics and their selection principles - Longchang Chemical<\/title>\n<meta name=\"description\" content=\"The addition of suitable antioxidants in plastic processing can stop or delay the ageing process, thus extending the service life of plastic products. 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