Kwenziwa kanjaniKhethaiAefaneleAi-antioxidant?
Ukukhetha i-antioxidant efanelekile kuyisinyathelo esibalulekile sokuthuthukisa ukuqina, ukubukeka nokusebenza kwe-polymer. Lokhu kudinga ukucatshangelwa okuphelele kwezinto eziningi ezifana nezakhiwo zamakhemikhali ze-polymer ngokwayo, izimo zokucubungula, indawo yokusetshenziswa kokuphela kanye nemithethonqubo yokuvikela imvelo.
Ama-Polyolefins(okufana ne-polyethylene kanye ne-polypropylene) ijwayele ukuwohloka kwe-oxidative eshisayo, edinga ama-antioxidants ayinhloko (afana nama-phenols) ukuze abambe ama-radicals mahhala kanye nama-antioxidants asizayo (njengama-phosphite) ukuze abole i-hydroperoxide.
I-PVCUkucekelwa phansi kusekelwe ikakhulukazi ku-ionization, futhi uma kuqhathaniswa nama-polyolefin, abakhiqizi be-PVC banesidingo esincane kakhulu sama-antioxidants. Njengamanje, ama-antioxidants asetshenziswa kakhulu e-PVC afakaI-AO1076, AO2246, njll.
Ipulasitiki yobunjiniyela(I-PA, i-PC, i-PPS) ngokuvamile icutshungulwa emazingeni okushisa aphezulu futhi idingaAntioxidants ukumelana nokushisaukuvimbela ukuphuzi nokulahlekelwa amandla.
①Ngezimo zokucubungula izinga lokushisa eliphezulu (>280 ℃), kuyalulekwa ukuthi ukhethe izinhlobo ezinokuguquguquka okuphansi kanye nokumelana nezinga lokushisa eliphezulu.
②Ngokuchayeka ngaphandle isikhathi eside, isistimu ye-synergistic anti-UV iyadingeka, njengezinhlanganisela ze-phenolic kanyeAma-Absorbers we-UV.
③Naka ukusebenzisana futhi ugweme imvula. Ngaphezu kwalokho, ama-antioxidants e-amine anokuvikelwa kombala okubuthakathaka.
④Inhlanganisela ye-antioxidant eyinhloko kanye ne-antioxidant eyisiza ingathuthukisa kakhulu umphumela wokulwa nokuguga.
Kafushane, ukusetshenziswa kwama-antioxidants kuphela akwanele ukubhekana nezimo ezihlukahlukene zohlelo lokusebenza, futhi ukuhlanganiswa kwezithasiselo eziningi kuyisinqumo esingcono.
Xhumana nathi ukuze uthole ulwazi olwengeziwe!
Isikhathi sokuthumela: May-12-2025