Glycidyl Methacrylate (GMA) ndi monomer yokhala ndi ma acrylate double bond ndi magulu a epoxy. Acrylate double bond imakhala ndi reactivity yayikulu, imatha kudzipangira polima, komanso imatha kupangidwanso ndi ma monomers ena ambiri; gulu la epoxy limatha kuchitapo kanthu ndi hydroxyl, amino, carboxyl kapena acid anhydride, ndikuyambitsa magulu ambiri ogwira ntchito, potero kubweretsa magwiridwe antchito ambiri pazogulitsa. Chifukwa chake, GMA ili ndi mitundu ingapo yogwiritsira ntchito popanga organic, kaphatikizidwe ka polima, kusinthidwa kwa polima, zida zophatikizika, zida zochiritsira za ultraviolet, zokutira, zomatira, zikopa, kupanga mapepala amafuta, kusindikiza ndi utoto, ndi zina zambiri.

Kugwiritsa ntchito GMA mu zokutira ufa

Zovala za Acrylic powder ndi gulu lalikulu la zokutira zaufa, zomwe zimatha kugawidwa kukhala ma hydroxyl acrylic resins, carboxyl acrylic resins, glycidyl acrylic resins, ndi amido acrylic resins malinga ndi machiritso osiyanasiyana omwe amagwiritsidwa ntchito. Pakati pawo, glycidyl acrylic resin ndiye amagwiritsidwa ntchito kwambiri popaka utomoni. Itha kupangidwa kukhala mafilimu okhala ndi machiritso monga polyhydric hydroxy acids, polyamines, polyols, polyhydroxy resins, ndi hydroxy polyester resins.

Methyl methacrylate, glycidyl methacrylate, butyl acrylate, styrene nthawi zambiri amagwiritsidwa ntchito polima polima kuti apange GMA mtundu wa acrylic resin, ndipo dodecyl dibasic acid imagwiritsidwa ntchito ngati mankhwala. Chophimba cha acrylic powder chokonzedwa chimakhala ndi ntchito yabwino. The kaphatikizidwe ndondomeko angagwiritse ntchito benzoyl peroxide (BPO) ndi azobisisobutyronitrile (AIBN) kapena zosakaniza awo monga intiators. Kuchuluka kwa GMA kumakhudza kwambiri machitidwe a filimu yokutira. Ngati kuchuluka kwake kuli kochepa kwambiri, kuphatikizika kwa utomoni kumakhala kochepa, machiritso ophatikizika ndi ochepa, kachulukidwe ka filimu yokutira sikokwanira, ndipo kukana kwa filimu yopaka sikokwanira.

Kugwiritsa ntchito GMA posintha polima

GMA ikhoza kumezeredwa pa polima chifukwa cha kukhalapo kwa acrylate double bond ndi ntchito zapamwamba, ndipo gulu la epoxy lomwe lili mu GMA likhoza kuchitapo kanthu ndi magulu osiyanasiyana ogwira ntchito kuti apange polima yogwira ntchito. GMA akhoza kumezanitsidwa kuti kusinthidwa polyolefin ndi njira monga njira Ankalumikiza, Sungunulani Ankalumikiza, olimba gawo Ankalumikiza, poizoniyu Ankalumikiza, etc., ndipo akhoza kupanga functionalized copolymers ndi ethylene, acrylate, etc. Izi ma polima functionalized angagwiritsidwe ntchito ngati toughening wothandizira. kulimbitsa mapulasitiki a uinjiniya kapena ngati ogwirizanitsa kuti apititse patsogolo kugwirizana kwa makina osakanikirana.

Choyambitsa chomwe chimagwiritsidwa ntchito pafupipafupi posintha polyolefin ndi GMA ndi dicumyl peroxide (DCP). Anthu ena amagwiritsanso ntchito benzoyl peroxide (BPO), acrylamide (AM), 2,5-di-tert-butyl peroxide. Oyambitsa 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 woyambitsa. Kulumikizidwa kwa GMA pa polyolefin kumabweretsa kusintha kwa mawonekedwe a polyolefin, zomwe zidzapangitse kusintha kwa mawonekedwe a pamwamba a polyolefin, rheological properties, kutentha ndi makina. GMA kumezanitsa-zosinthidwa polyolefin kumawonjezera polarity wa unyolo maselo ndipo nthawi yomweyo kumawonjezera pamwamba polarity. Chifukwa chake, kukhudzana kwapamtunda kumachepa pomwe kuchuluka kwa kumezanitsa kumawonjezeka. Chifukwa cha kusintha kwa mapangidwe a polima pambuyo pa kusinthidwa kwa GMA, zidzakhudzanso mawonekedwe ake a crystalline ndi makina.

Kugwiritsa ntchito GMA pakuphatikizika kwa utomoni wochiritsira wa UV

GMA ingagwiritsidwe ntchito popanga utomoni wochiritsira wa UV kudzera m'njira zosiyanasiyana zopangira. Njira imodzi ndiyoyamba kupeza prepolymer yomwe ili ndi carboxyl kapena magulu amino pa unyolo wam'mbali kudzera mu polymerization yayikulu kapena condensation polymerization, ndiyeno gwiritsani ntchito GMA kuchitapo kanthu ndi magulu ogwira ntchitowa kuti adziwitse magulu opanga zithunzi kuti apeze utomoni wotha kuchira. Mu copolymerization yoyamba, ma comonomers osiyanasiyana angagwiritsidwe ntchito kupeza ma polima okhala ndi zinthu zosiyana zomaliza. Feng Zongcai et al. ntchito 1,2,4-trimellitic anhydride ndi ethylene glycol kuti anachita synthesize ma polima hyperbranched, ndiyeno anayambitsa photosensitive magulu kudzera GMA potsiriza kupeza photocurable utomoni ndi bwino alkali solubility. Lu Tingfeng ndi ena adagwiritsa ntchito poly-1,4-butanediol adipate, toluene diisocyanate, dimethylolpropionic acid ndi hydroxyethyl acrylate kuti ayambe kupanga prepolymer yokhala ndi zomangira zowoneka bwino zapawiri, kenako ndikuyiyambitsa kudzera mu GMA Zomangira ziwiri zochiritsika zopepuka zimachotsedwa ndi triethylamine. kupeza madzi polyurethane acrylate emulsion.