{"id":8639,"date":"2025-05-16T06:54:57","date_gmt":"2025-05-16T06:54:57","guid":{"rendered":"https:\/\/changhongchemical.com\/?p=8639"},"modified":"2026-04-27T11:18:16","modified_gmt":"2026-04-27T11:18:16","slug":"antioxidants-used-in-polymers","status":"publish","type":"post","link":"https:\/\/changhongchemical.com\/fr\/antioxidants-used-in-polymers\/","title":{"rendered":"Antioxydants utilis\u00e9s dans les polym\u00e8res"},"content":{"rendered":"

(1) Antioxydants ph\u00e9noliques
\nPhenolic antioxidants are the most widely used and most abundant antioxidants in polymer materials. The phenolic hydroxyl group in phenolic antioxidants can release active hydrogen to capture the \u2018key offender\u2019 free radicals in polymer degradation. Natural products such as VE, tea polyphenols, and low molecular compounds such as 2,6-di-tert-butylphenol (BHT) are phenolic antioxidants. Hindered phenolic antioxidants are a class of compounds with substituents on one or both sides of the hydroxyl group (-OH) on the benzene ring. Because the hydroxyl group is spatially hindered, the H atom is easily dislodged from the molecule with peroxyl radicals (ROO .) , alkoxyl radicals (RO.), hydroxyl radicals (.OH), etc. to combine to make them inactive, thus terminating the chain reaction of thermo-oxidative aging. Hindered phenolic antioxidants are non-polluting products and are suitable for colourless or light-coloured products. Moreover, hindered phenolic antioxidants have large molecular weight, good compatibility with polymer materials and low toxicity, so the consumption ratio of high molecular weight hindered phenolic varieties represented by 1010<\/a> and 1076 increases year by year, while 1010 becomes the most excellent product among polymer antioxidants with high molecular weight, good compatibility with polymer materials, excellent antioxidant effect, good safety, and the largest consumption.
\n(2) Antioxydants \u00e0 base de phosphite
\nLe r\u00f4le principal de l'antioxydant phosphite est d'\u00e9liminer les hydroperoxydes, non seulement la d\u00e9gradation du polym\u00e8re produit des hydroperoxydes, mais l'antioxydant principal qui inhibe l'ajout d'hydroperoxydes en m\u00eame temps produit \u00e9galement des hydroperoxydes. Par cons\u00e9quent, en tant qu'antioxydant auxiliaire, les antioxydants phosphites ne sont pas tr\u00e8s efficaces lorsqu'ils sont utilis\u00e9s seuls, mais ils ont un effet significatif lorsqu'ils sont utilis\u00e9s avec l'antioxydant principal. Le produit repr\u00e9sentatif de l'antioxydant phosphite 168 est la deuxi\u00e8me vari\u00e9t\u00e9 d'antioxydants produite et consomm\u00e9e au niveau national, apr\u00e8s le 1010. 626 et 618 sont principalement utilis\u00e9s pour le traitement \u00e0 haute temp\u00e9rature des mat\u00e9riaux polym\u00e8res ou des produits autour de 300 \u2103, le r\u00f4le des mat\u00e9riaux polym\u00e8res pour am\u00e9liorer efficacement la r\u00e9sistance \u00e0 l'oxydation thermique \u00e0 haute temp\u00e9rature, tout en maintenant le bon aspect des produits polym\u00e8res.
\n(3) Antioxydants \u00e0 base de soufre
\nLes antioxydants \u00e0 base de soufre et les antioxydants \u00e0 base de phosphore ont pour r\u00f4le principal d'\u00e9liminer les hydroperoxydes, mais ils jouent \u00e9galement le r\u00f4le d'antioxydants auxiliaires. La production nationale d'antioxydants contenant du soufre peut \u00eatre divis\u00e9e, en fonction de la structure mol\u00e9culaire, en trois vari\u00e9t\u00e9s : les antioxydants \u00e0 base d'esters de soufre, les antioxydants \u00e0 base de bisph\u00e9nol et les antioxydants ph\u00e9noliques \u00e0 base d'\u00e9thers de soufre. La mol\u00e9cule de l'antioxydant thiobisph\u00e9nol contient une structure ph\u00e9nolique encombr\u00e9e ; dans les mat\u00e9riaux polym\u00e8res, elle pr\u00e9sente une r\u00e9sistance \u00e9lev\u00e9e \u00e0 l'oxyg\u00e8ne et \u00e0 la chaleur ; l'antioxydant thiobisph\u00e9nol est g\u00e9n\u00e9ralement divis\u00e9 en un type principal d'antioxydant ph\u00e9nolique encombr\u00e9.
\n(4) Passivation des ions m\u00e9talliques
\nLes passivateurs d'ions m\u00e9talliques contiennent des condensats d'hydrazide, d'oxime et d'ald\u00e9hyde-amine, ainsi que d'autres groupes de coordination, qui complexent les ions m\u00e9talliques. Le produit le plus repr\u00e9sentatif est le 1024, qui est un compos\u00e9 de type dihydrazide et contient \u00e9galement un groupe fonctionnel ph\u00e9nolique combin\u00e9 encombr\u00e9, qui conf\u00e8re au produit \u00e0 la fois une r\u00e9sistance au cuivre et une r\u00e9sistance au vieillissement par la chaleur et l'oxyg\u00e8ne.
\n(5) Antioxydants \u00e0 base d'amines aromatiques
\nLes antioxydants de type amine aromatique sont g\u00e9n\u00e9r\u00e9s par la condensation de l'aminoph\u00e9nol ou de l'hydroquinone avec l'aniline, ce type de produit est de couleur plus fonc\u00e9e, c'est un antioxydant polluant, et la plupart des produits ont un certain degr\u00e9 de toxicit\u00e9, un grand nombre de produits en caoutchouc, d'autres mat\u00e9riaux polym\u00e8res, l'utilisation de moins, et ce type d'antioxydant est \u00e9galement connu sous le nom d'antioxydant.<\/p>\n

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(1) Phenolic antioxidants Phenolic antioxidants are the most widely used and most abundant antioxidants in polymer materials. The phenolic hydroxyl group in phenolic antioxidants can release active hydrogen to capture the \u2018key offender\u2019 free…<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[152],"tags":[],"class_list":["post-8639","post","type-post","status-publish","format-standard","hentry","category-antioxidant"],"yoast_head":"\nAntioxidants used in polymers - Changhong Chemical<\/title>\n<meta name=\"description\" content=\"(1) Phenolic antioxidants Phenolic antioxidants are the most widely used and most abundant antioxidants in polymer materials. 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