{"id":5406,"date":"2022-07-24T05:44:35","date_gmt":"2022-07-24T05:44:35","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=5406"},"modified":"2022-07-24T06:00:32","modified_gmt":"2022-07-24T06:00:32","slug":"brief-description-of-the-role-of-antioxidants-in-plastics-and-their-selection-principles","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/nl\/brief-description-of-the-role-of-antioxidants-in-plastics-and-their-selection-principles\/","title":{"rendered":"Korte beschrijving van de rol van antioxidanten in kunststoffen en hun selectieprincipes"},"content":{"rendered":"

Korte beschrijving van de rol van antioxidanten in kunststoffen en hun selectieprincipes<\/strong><\/h1>\n

De toevoeging van geschikte antioxidanten bij het verwerken van kunststof kan het verouderingsproces stoppen of vertragen en zo de levensduur van kunststof producten verlengen. De keuze van antioxidanten moet gebaseerd zijn op het type kunststof, de verwerkingsapparatuur, de procesomstandigheden, de verscheidenheid aan andere additieven en de toegevoegde hoeveelheid, de omgeving waarin het product gebruikt wordt en de levensduur van het product. De keuze van antioxidanten voor kunststoffen moet in principe gebaseerd zijn op de volgende principes.<\/p>\n

I. Compatibiliteit. Kunststof polymeer en antioxidant compatibiliteit is vaak slecht, meestal bij hoge temperaturen zal worden antioxidant en polymeer smelt gecombineerd, polymeer uitharding zal compatibel zijn met antioxidant moleculen in het midden van het polymeer moleculen. Binnen het doseringsbereik van de formulering moet het antioxidant worden gesmolten bij de verwerkingstemperatuur. Ontwerpformuleringen, de keuze van vaste antioxidanten, lichte stabilisatoren, het smeltpunt of smeltbereik van de bovengrens, mag niet hoger zijn dan de verwerkingstemperatuur van plastic polymeren.<\/p>\n

Ten tweede, migratie. Kunststof producten, met name het oppervlak en de volumeverhouding (of massaverhouding) van de kleinere waarde van het product, oxidatie vindt voornamelijk plaats op het oppervlak van het product, die continue migratie van antioxidanten vereist van de kunststof producten aan het oppervlak van het product en een rol spelen. Echter, als de migratiesnelheid naar het oppervlak van het product te snel is, het migratiebedrag te groot is, moet de antioxidant vluchtig zijn naar het oppervlak van het product in het milieu, of diffusiemiddel en productoppervlak contact met andere media en verlies, dit verlies is in feite onvermijdelijk, ontwerpformuleringen te overwegen. Wanneer er een keuze van anti-oxidant rassen, moeten kiezen voor een relatief groot molecuulgewicht, smeltpunt passende hoge soorten, en de meest ernstige gebruik van het milieu om de hoeveelheid anti-oxidant gebruik te bepalen.<\/p>\n

Ten derde, stabiliteit. Anti-oxidant in plastic materialen moeten stabiel blijven, in het gebruik van milieu-en hoge-temperatuur verwerking vluchtig verlies, geen verkleuring of kleur, geen ontleding (in aanvulling op de rol van antioxidanten voor de verwerking warmte stabilisatie), niet met andere additieven nadelige chemische reacties, niet corrosief machines en apparatuur, niet gemakkelijk ge\u00ebxtraheerd door andere stoffen op het oppervlak van het product.<\/p>\n

Ten vierde, verwerkbaarheid. Kunststof producten verwerking, het toevoegen van antioxidanten om de hars viscositeit en schroef koppel kan veranderen. Antioxidant en hars smeltbereik als het verschil groot is, zal produceren antioxidant bias stroom of remming van schroef fenomeen. Het smeltpunt van de antioxidant is lager dan de verwerkingstemperatuur van 100 \u2103 of meer, moet de antioxidant eerst worden gemaakt in een bepaalde master batch, en vervolgens gemengd met hars verwerkingsproducten, om ongelijke verdeling van antioxidant in het product als gevolg van bias stroom en verwerking opbrengst daling te voorkomen.<\/p>\n

Ten vijfde, het milieu en de gezondheid. Antioxidant moet niet-toxisch zijn of een lage toxiciteit, geen stof of weinig stof, geen schadelijke effecten op het menselijk lichaam in de verwerking en het gebruik van plastic producten, geen schade aan dieren en planten, geen vervuiling van lucht, bodem en water systeem.<\/p>\n

 <\/p>\n

 <\/p>","protected":false},"excerpt":{"rendered":"

Korte beschrijving van de rol van antioxidanten in kunststoffen en hun selectieprincipes De toevoeging van geschikte antioxidanten bij het verwerken van kunststoffen kan het verouderingsproces stoppen of vertragen en zo de levensduur van kunststof producten verlengen. De selectie van antioxidanten moet gebaseerd zijn op het type kunststof, de verwerkingsapparatuur, de procesomstandigheden, de verscheidenheid aan [...]<\/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":"\nBrief description of the role of antioxidants in plastics and their selection principles - Longchang Chemical<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangchemical.com\/nl\/brief-description-of-the-role-of-antioxidants-in-plastics-and-their-selection-principles\/\" \/>\n<meta property=\"og:locale\" content=\"nl_NL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Brief description of the role of antioxidants in plastics and their selection principles - Longchang Chemical\" \/>\n<meta property=\"og:description\" content=\"Brief description of the role of antioxidants in plastics and their selection principles 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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