Indlela yokwenzaKhethaiAokufaneleAi-antioxidant？
Ukukhetha i-antioxidant efanele kuyisinyathelo esibalulekile sokuthuthukisa ukuqina, ukubukeka kanye nokusebenza kwe-polymer. Lokhu kudinga ukucatshangelwa okubanzi kwezinto eziningi ezifana nezakhiwo zamakhemikhali ze-polymer uqobo, izimo zokucubungula, indawo yokusetshenziswa kokugcina kanye nemithetho yokuvikela imvelo.
Ama-Polyolefin(njenge-polyethylene ne-polypropylene) zivame ukuwohloka kwe-oxidative ekushiseni, okudinga ama-antioxidants ayinhloko (njenge-phenols) ukuze abambe ama-free radical kanye nama-antioxidants asizayo (njenge-phosphites) ukuze abolise i-hydroperoxide.
I-PVCUkuwohloka kwe-'s degradation kusekelwe kakhulu ku-ionization, futhi uma kuqhathaniswa nama-polyolefin, abakhiqizi be-PVC banesidingo esincane kakhulu sama-antioxidants. Njengamanje, ama-antioxidants asetshenziswa kakhulu e-PVC afaka phakathiAO1076, AO2246, njll.
Amapulasitiki obunjiniyela(i-PA, i-PC, i-PPS) ngokuvamile zicutshungulwa emazingeni okushisa aphezulu futhi zidingaama-antioxidant amelana nokushisaukuvimbela ukuphuzi nokulahlekelwa amandla.
①Ngezimo zokucubungula ezishisa kakhulu (>280 ℃), kuyalulekwa ukukhetha izinhlobo ezinokuguquguquka okuphansi kanye nokumelana nokushisa okuphezulu.
②Ukuze ubonakale ngaphandle isikhathi eside, kudingeka uhlelo oluhambisanayo lokulwa ne-UV, njengezakhi ze-phenolic kanyeizifutho ze-UV.
③Naka ukuhambisana futhi ugweme imvula. Ngaphezu kwalokho, ama-antioxidants e-amine anokuvikelwa kombala okubuthakathaka.
④Inhlanganisela ye-antioxidant eyinhloko kanye ne-antioxidant esiza ingathuthukisa kakhulu umphumela wokulwa nokuguga.
Ngamafuphi, ukusetshenziswa kwama-antioxidants kuphela akwanele ukubhekana nezimo ezahlukahlukene zokusetshenziswa, futhi ukuhlanganiswa kwezithasiselo eziningi kuyindlela engcono.
Xhumana nathi ukuthola ulwazi olwengeziwe!
Isikhathi sokuthunyelwe: Meyi-12-2025