Glycidyl Methacrylate (GMA) ndi monomer yokhala ndi ma acrylate double bonds ndi magulu a epoxy. Acrylate double bond imakhala ndi reactivity yayikulu, imatha kudzipangira polymerization reaction, ndipo imathanso kupangidwa copolymer ndi ma monomers ena ambiri; gulu la epoxy limatha kuchitapo kanthu ndi hydroxyl, amino, carboxyl kapena acid anhydride, ndikuyambitsa magulu ogwira ntchito kwambiri, motero kumabweretsa magwiridwe antchito ambiri ku chinthucho. Chifukwa chake, GMA ili ndi ntchito zambiri mu organic synthesis, polymer synthesis, polymer modification, composite materials, ultraviolet curing materials, coating, glue, chikopa, chemical fiber papermaking, printing and dyeing, ndi zina zambiri.

Kugwiritsa ntchito GMA mu ufa wokutira

Zophimba ufa wa acrylic ndi gulu lalikulu la zophimba ufa, zomwe zingagawidwe m'magulu a hydroxyl acrylic resins, carboxyl acrylic resins, glycidyl acrylic resins, ndi amido acrylic resins malinga ndi zinthu zosiyanasiyana zophikira zomwe zimagwiritsidwa ntchito. Pakati pawo, glycidyl acrylic resin ndiye resin yophikira ufa yomwe imagwiritsidwa ntchito kwambiri. Itha kupangidwa kukhala mafilimu okhala ndi zophikira monga polyhydric hydroxy acids, polyamines, polyols, polyhydroxy resins, ndi hydroxy polyester resins.

Methyl methacrylate, glycidyl methacrylate, butyl acrylate, styrene nthawi zambiri amagwiritsidwa ntchito popanga free radical polymerization kuti apange GMA acrylic resin, ndipo dodecyl dibasic acid imagwiritsidwa ntchito ngati wothandizira kuchiritsa. Chophimba cha ufa wa acrylic chomwe chakonzedwa chimakhala ndi magwiridwe antchito abwino. Njira yopangira ingagwiritse ntchito benzoyl peroxide (BPO) ndi azobisisobutyronitrile (AIBN) kapena zosakaniza zawo ngati zoyambitsa. Kuchuluka kwa GMA kumakhudza kwambiri magwiridwe antchito a filimu yophimba. Ngati kuchuluka kwake kuli kochepa kwambiri, digiri yolumikizira ya resin ndi yochepa, mfundo zolumikizirana zophikira ndizochepa, kuchuluka kwa crosslinking kwa filimu yophimba sikukwanira, ndipo kukana kwa glaze filimuyo ndi kotsika.

Kugwiritsa ntchito GMA mu kusintha kwa polima

GMA ikhoza kulumikizidwa pa polima chifukwa cha kukhalapo kwa acrylate double bond yokhala ndi ntchito yayikulu, ndipo gulu la epoxy lomwe lili mu GMA limatha kuchitapo kanthu ndi magulu ena osiyanasiyana ogwira ntchito kuti apange polima yogwira ntchito. GMA ikhoza kulumikizidwa ku polyolefin yosinthidwa pogwiritsa ntchito njira monga solution grafting, melt grafting, solid phase grafting, radiation grafting, ndi zina zotero, ndipo imathanso kupanga ma copolymers ogwira ntchito ndi ethylene, acrylate, ndi zina zotero. Ma polima ogwiritsidwa ntchito awa angagwiritsidwe ntchito ngati othandizira kulimbitsa mapulasitiki auinjiniya kapena ngati othandizira kuti azitha kugwirizana ndi machitidwe osakanikirana.

Choyambitsa chomwe chimagwiritsidwa ntchito nthawi zambiri posintha polyolefin ndi GMA ndi dicumyl peroxide (DCP). Anthu ena amagwiritsanso ntchito benzoyl peroxide (BPO), acrylamide (AM), 2,5-di-tert-butyl peroxide. Zoyambitsa monga oxy-2,5-dimethyl-3-hexyne (LPO) kapena 1,3-di-tert-butyl cumene peroxide. Pakati pawo, AM imakhudza kwambiri kuchepetsa kuwonongeka kwa polypropylene ikagwiritsidwa ntchito ngati choyambitsa. Kuyika GMA pa polyolefin kudzatsogolera kusintha kwa kapangidwe ka polyolefin, komwe kudzayambitsa kusintha kwa mawonekedwe a pamwamba pa polyolefin, mawonekedwe a rheological, mawonekedwe a kutentha ndi mawonekedwe a makina. Polyolefin yosinthidwa ndi GMA imawonjezera polarity ya unyolo wa molekyulu ndipo nthawi yomweyo imawonjezera polarity pamwamba. Chifukwa chake, ngodya yolumikizira pamwamba imachepa pamene kuchuluka kwa kuyika kumawonjezeka. Chifukwa cha kusintha kwa kapangidwe ka polima pambuyo pa kusintha kwa GMA, zidzakhudzanso mawonekedwe ake a kristalo ndi makina.

Kugwiritsa ntchito GMA popanga utomoni wochiritsika wa UV

GMA ingagwiritsidwe ntchito popanga ma resini ochiritsika a UV kudzera m'njira zosiyanasiyana zopangira. Njira imodzi ndiyo kupeza kaye prepolymer yokhala ndi magulu a carboxyl kapena amino pa unyolo wa mbali kudzera mu radical polymerization kapena condensation polymerization, kenako gwiritsani ntchito GMA kuti igwirizane ndi magulu ogwira ntchito awa kuti ibweretse magulu ozindikira kuwala kuti ipeze utomoni wokhoza kuwala. Mu copolymerization yoyamba, ma coonomers osiyanasiyana angagwiritsidwe ntchito kupeza ma polima okhala ndi mawonekedwe osiyanasiyana omaliza. Feng Zongcai et al. adagwiritsa ntchito 1,2,4-trimellitic anhydride ndi ethylene glycol kuti agwirizane ndi kupanga ma polima ochulukirapo, kenako adayambitsa magulu ozindikira kuwala kudzera mu GMA kuti pamapeto pake apeze utomoni wokhoza kuwala wokhala ndi kusungunuka kwa alkali bwino. Lu Tingfeng ndi ena adagwiritsa ntchito poly-1,4-butanediol adipate, toluene diisocyanate, dimethylolpropionic acid ndi hydroxyethyl acrylate kuti ayambe kupanga prepolymer yokhala ndi ma bond awiri ogwira ntchito omwe ali ndi kuwala, kenako nkuwalowetsa kudzera mu GMA. Ma bond awiri omwe amachiritsidwa mosavuta amachotsedwa ndi triethylamine kuti apeze emulsion ya polyurethane acrylate yopangidwa ndi madzi.