Glycidyl Methacrylate (GMA) yog ib qho monomer uas muaj ob qho tib si acrylate ob chav bonds thiab epoxy pawg. Acrylate ob chav bond muaj reactivity siab, tuaj yeem dhau los ntawm kev ua tshuaj tiv thaiv tus kheej, thiab kuj tuaj yeem copolymerized nrog ntau lwm cov monomers; epoxy pawg tuaj yeem ua tshuaj tiv thaiv nrog hydroxyl, amino, carboxyl lossis acid anhydride, qhia ntau pawg ua haujlwm, yog li coj ntau yam kev ua haujlwm rau cov khoom. Yog li ntawd, GMA muaj ntau yam kev siv hauv kev tsim cov organic, kev tsim cov polymer, kev hloov kho polymer, cov ntaub ntawv sib xyaw, cov ntaub ntawv kho ultraviolet, txheej, nplaum, tawv, tshuaj fiber papermaking, luam ntawv thiab dyeing, thiab ntau lwm yam teb.

Kev siv GMA hauv cov hmoov txheej

Cov tshuaj pleev xim acrylic yog ib pawg loj ntawm cov tshuaj pleev xim hmoov, uas tuaj yeem muab faib ua hydroxyl acrylic resins, carboxyl acrylic resins, glycidyl acrylic resins, thiab amido acrylic resins raws li cov neeg sawv cev kho sib txawv siv. Ntawm lawv, glycidyl acrylic resin yog cov tshuaj pleev xim hmoov siv ntau tshaj plaws. Nws tuaj yeem tsim ua cov yeeb yaj kiab nrog cov neeg sawv cev kho xws li polyhydric hydroxy acids, polyamines, polyols, polyhydroxy resins, thiab hydroxy polyester resins.

Methyl methacrylate, glycidyl methacrylate, butyl acrylate, styrene feem ntau yog siv rau cov dawb radical polymerization los synthesize GMA hom acrylic resin, thiab dodecyl dibasic acid yog siv ua tus neeg sawv cev curing. Cov acrylic hmoov txheej uas tau npaj muaj kev ua tau zoo. Cov txheej txheem synthesis tuaj yeem siv benzoyl peroxide (BPO) thiab azobisisobutyronitrile (AIBN) lossis lawv cov sib xyaw ua cov pib. Qhov ntau ntawm GMA muaj kev cuam tshuam loj rau kev ua haujlwm ntawm cov zaj duab xis txheej. Yog tias qhov ntau tsawg dhau, qhov degree crosslinking ntawm cov resin qis, cov ntsiab lus crosslinking curing tsawg, qhov ceev crosslinking ntawm cov zaj duab xis txheej tsis txaus, thiab qhov cuam tshuam ntawm cov zaj duab xis txheej tsis zoo.

Daim ntawv thov ntawm GMA hauv kev hloov kho polymer

GMA tuaj yeem raug txuas rau ntawm cov polymer vim muaj cov acrylate ob chav sib txuas nrog cov haujlwm siab dua, thiab pawg epoxy uas muaj nyob hauv GMA tuaj yeem cuam tshuam nrog ntau yam pawg ua haujlwm los tsim cov polymer ua haujlwm. GMA tuaj yeem txuas rau polyolefin hloov kho los ntawm cov txheej txheem xws li kev daws teeb meem, kev sib xyaw ua ke yaj, kev sib xyaw ua ke theem, kev sib xyaw ua ke hluav taws xob, thiab lwm yam, thiab nws kuj tuaj yeem tsim cov copolymers ua haujlwm nrog ethylene, acrylate, thiab lwm yam. Cov polymers ua haujlwm no tuaj yeem siv ua cov neeg sawv cev tawv kom tawv cov yas engineering lossis ua cov khoom sib xws los txhim kho kev sib raug zoo ntawm cov txheej txheem sib xyaw.

Tus neeg pib siv feem ntau rau kev hloov pauv polyolefin los ntawm GMA yog dicumyl peroxide (DCP). Ib txhia neeg kuj siv benzoyl peroxide (BPO), acrylamide (AM), 2,5-di-tert-butyl peroxide. Cov neeg pib xws li oxy-2,5-dimethyl-3-hexyne (LPO) lossis 1,3-di-tert-butyl cumene peroxide. Ntawm lawv, AM muaj qhov cuam tshuam tseem ceeb rau kev txo qhov kev puas tsuaj ntawm polypropylene thaum siv ua tus pib. Kev grafting ntawm GMA ntawm polyolefin yuav ua rau muaj kev hloov pauv ntawm cov qauv polyolefin, uas yuav ua rau muaj kev hloov pauv ntawm cov khoom ntawm qhov chaw polyolefin, cov khoom rheological, cov khoom thermal thiab cov khoom siv kho tshuab. GMA graft-modified polyolefin ua rau muaj polarity ntawm cov saw molecular thiab tib lub sijhawm ua rau muaj polarity ntawm qhov chaw. Yog li ntawd, lub kaum sab xis ntawm qhov chaw txo qis thaum tus nqi grafting nce. Vim muaj kev hloov pauv hauv cov qauv polymer tom qab GMA hloov kho, nws tseem yuav cuam tshuam rau nws cov khoom siv crystalline thiab cov khoom siv kho tshuab.

Kev siv GMA hauv kev tsim cov tshuaj UV kho tau

GMA siv tau rau hauv kev tsim cov tshuaj pleev xim UV kho tau los ntawm ntau txoj kev tsim tshuaj. Ib txoj kev yog ua ntej kom tau txais cov prepolymer uas muaj cov carboxyl lossis amino pawg ntawm cov saw hlau sab los ntawm kev sib xyaw ua ke ntawm cov tshuaj polymerization lossis condensation polymerization, thiab tom qab ntawd siv GMA los tshuaj xyuas nrog cov pab pawg ua haujlwm no los qhia cov pab pawg photosensitive kom tau txais cov tshuaj pleev xim photocurable. Hauv thawj qhov kev sib xyaw ua ke, cov comonomers sib txawv tuaj yeem siv los tau txais cov polymers nrog cov khoom kawg sib txawv. Feng Zongcai et al. siv 1,2,4-trimellitic anhydride thiab ethylene glycol los tshuaj xyuas los tsim cov polymers hyperbranched, thiab tom qab ntawd qhia cov pab pawg photosensitive los ntawm GMA kom thaum kawg tau txais cov tshuaj pleev xim photocurable nrog cov alkali solubility zoo dua. Lu Tingfeng thiab lwm tus siv poly-1,4-butanediol adipate, toluene diisocyanate, dimethylolpropionic acid thiab hydroxyethyl acrylate los ua ntej tsim cov prepolymer nrog cov khoom sib txuas ob npaug uas muaj zog, thiab tom qab ntawd qhia nws los ntawm GMA. Ntau cov khoom sib txuas ob npaug uas kho tau lub teeb tau raug tshem tawm los ntawm triethylamine kom tau txais cov dej polyurethane acrylate emulsion.