ʻO Glycidyl Methacrylate (GMA) kahi monomer nona nā pilina pālua acrylate a me nā hui epoxy. Loaʻa i ka pilina pālua acrylate ke kiʻekiʻe o ka reactivity, hiki ke hana i ka hopena polymerization ponoʻī, a hiki ke copolymerized me nā monomers ʻē aʻe he nui; hiki i ka hui epoxy ke hana me ka hydroxyl, amino, carboxyl a i ʻole acid anhydride, e hoʻolauna ana i nā hui hana hou aʻe, a laila e lawe mai ana i nā hana hou aʻe i ka huahana. No laila, he ākea loa nā noi a GMA i ka synthesis organik, synthesis polymer, hoʻololi polymer, nā mea hui, nā mea hoʻōla ultraviolet, nā uhi, nā mea hoʻopili, ka ʻili, ka pepa fiber kemika, ka paʻi a me ka hoʻoluʻu ʻana, a me nā kahua ʻē aʻe he nui.

Ka hoʻohana ʻana o GMA i ka uhi pauka

ʻO nā uhi pauka acrylic kahi māhele nui o nā uhi pauka, hiki ke hoʻokaʻawale ʻia i nā resins hydroxyl acrylic, nā resins carboxyl acrylic, nā resins glycidyl acrylic, a me nā resins amido acrylic e like me nā mea hoʻōla like ʻole i hoʻohana ʻia. I waena o lākou, ʻo ka resin glycidyl acrylic ka resin uhi pauka i hoʻohana nui ʻia. Hiki ke hana ʻia i loko o nā kiʻiʻoniʻoni me nā mea hoʻōla e like me nā polyhydric hydroxy acids, polyamines, polyols, polyhydroxy resins, a me nā hydroxy polyester resins.

ʻO ka Methyl methacrylate, glycidyl methacrylate, butyl acrylate, styrene ka mea maʻamau e hoʻohana ʻia no ka polymerization radical free e synthesize i ka resin acrylic ʻano GMA, a hoʻohana ʻia ka dodecyl dibasic acid ma ke ʻano he mea hoʻōla. Loaʻa i ka uhi pauka acrylic i hoʻomākaukau ʻia ka hana maikaʻi. Hiki i ke kaʻina hana synthesis ke hoʻohana i ka benzoyl peroxide (BPO) a me azobisisobutyronitrile (AIBN) a i ʻole kā lākou hui ʻana ma ke ʻano he mea hoʻomaka. He mana nui ka nui o GMA i ka hana o ke kiʻiʻoniʻoni uhi. Inā liʻiliʻi loa ka nui, haʻahaʻa ke kekelē crosslinking o ka resin, he kakaikahi nā kiko crosslinking curing, ʻaʻole lawa ka nui o ke crosslinking o ke kiʻiʻoniʻoni uhi, a maikaʻi ʻole ke kūpaʻa hopena o ke kiʻiʻoniʻoni uhi.

Ka hoʻohana ʻana o GMA i ka hoʻololi ʻana o ka polymer

Hiki ke hoʻopili ʻia ʻo GMA ma luna o ka polymer ma muli o ke alo o kahi pilina pālua acrylate me ka hana kiʻekiʻe aʻe, a hiki i ka hui epoxy i loko o GMA ke hana me nā ʻano hui hana ʻē aʻe e hana i kahi polymer functionalized. Hiki ke hoʻopili ʻia ʻo GMA i ka polyolefin i hoʻololi ʻia e nā ʻano hana e like me ka solution grafting, melt grafting, solid phase grafting, radiation grafting, etc., a hiki nō hoʻi iā ia ke hana i nā copolymers functionalized me ethylene, acrylate, etc. Hiki ke hoʻohana ʻia kēia mau polymers functionalized ma ke ʻano he mau mea hoʻoikaika e hoʻoikaika i nā plastics ʻenekinia a i ʻole he mau mea hoʻohui e hoʻomaikaʻi i ka hoʻohālikelike ʻana o nā ʻōnaehana hui.

ʻO ka mea hoʻomaka i hoʻohana pinepine ʻia no ka hoʻololi ʻana o ka polyolefin e GMA ʻo dicumyl peroxide (DCP). Hoʻohana pū kekahi poʻe i ka benzoyl peroxide (BPO), acrylamide (AM), 2,5-di-tert-butyl peroxide. ʻO nā mea hoʻomaka e like me oxy-2,5-dimethyl-3-hexyne (LPO) a i ʻole 1,3-di-tert-butyl cumene peroxide. I waena o lākou, he hopena koʻikoʻi ko AM i ka hōʻemi ʻana i ka hōʻino ʻana o ka polypropylene i ka wā e hoʻohana ʻia ai he mea hoʻomaka. ʻO ka hoʻopili ʻana o GMA ma ka polyolefin e alakaʻi i ka hoʻololi ʻana o ke ʻano polyolefin, kahi e hoʻololi ai i nā waiwai o ka ʻili o ka polyolefin, nā waiwai rheological, nā waiwai thermal a me nā waiwai mechanical. Hoʻonui ka polyolefin i hoʻololi ʻia e ka graft GMA i ka polarity o ke kaulahao molekala a i ka manawa like e hoʻonui ai i ka polarity o ka ʻili. No laila, emi ka kihi pili o ka ʻili i ka piʻi ʻana o ka helu grafting. Ma muli o nā loli i ke ʻano polymer ma hope o ka hoʻololi ʻana o GMA, e hoʻopilikia pū ia i kona mau waiwai crystalline a me mechanical.

Ka hoʻohana ʻana o GMA i ka synthesis o ka resin UV curable

Hiki ke hoʻohana ʻia ʻo GMA i ka synthesis o nā resins UV curable ma o nā ʻano ala synthetic like ʻole. ʻO kekahi ʻano hana, ʻo ia ke kiʻi mua i kahi prepolymer e loaʻa ana nā hui carboxyl a amino paha ma ke kaulahao ʻaoʻao ma o ka polymerization radical a i ʻole ka polymerization condensation, a laila e hoʻohana iā GMA e hana me kēia mau hui hana e hoʻolauna i nā hui photosensitive e loaʻa ai kahi resin photocurable. I ka copolymerization mua, hiki ke hoʻohana ʻia nā comonomers like ʻole e loaʻa ai nā polymers me nā waiwai hope like ʻole. Ua hoʻohana ʻo Feng Zongcai et al. i ka 1,2,4-trimellitic anhydride a me ka ethylene glycol e hana ai e synthesize i nā polymers hyperbranched, a laila hoʻolauna i nā hui photosensitive ma o GMA e loaʻa hope ai kahi resin photocurable me ka solubility alkali maikaʻi aʻe. Ua hoʻohana ʻo Lu Tingfeng a me nā mea ʻē aʻe i ka poly-1,4-butanediol adipate, toluene diisocyanate, dimethylolpropionic acid a me ka hydroxyethyl acrylate e hana mua i kahi prepolymer me nā pilina pālua photosensitive, a laila hoʻokomo iā ia ma o GMA. Hoʻopau ʻia nā pilina pālua hiki ke ho'ōla ʻia e ka triethylamine e loaʻa ai ka emulsion polyurethane acrylate i lawe ʻia i ka wai.