Epoxy resins yog thermosetting polymers uas muaj cov epoxide (oxirane) rings. Cov resins no tau siv dav hauv cov txheej txheem, cov nplaum, cov khoom sib xyaw, thiab cov khoom siv hluav taws xob vim lawv cov khoom tshwj xeeb, xws li kev ua haujlwm siab, tshuaj tiv thaiv, hluav taws xob rwb thaiv tsev, thiab lub zog txhua yam.
Kev sib txuas ntawm epoxy resins, hu ua curing, yog txheej txheem tseem ceeb uas txiav txim siab qhov kawg ntawm cov khoom kho. curing agents, tseem hu ua hardeners, ua lub luag haujlwm tseem ceeb hauv cov txheej txheem no los ntawm kev pib thiab ua kom yooj yim rau cov tshuaj tiv thaiv crosslinking.
Ntau cov tshuaj tua kab mob muaj rau epoxy resins, suav nrog amines, anhydrides, thiab phenols. Kev xaiv ntawm tus neeg sawv cev kho kom haum yog nyob ntawm qhov xav tau ntawm cov khoom siv kho mob epoxy, cov txheej txheem ua haujlwm, thiab cov ntawv thov. aromatic amines, xws li 4,4′-diaminodiphenylmethane (ddm), muaj qhov zoo xws li cov iav hloov pauv kub (tg), tshuaj tiv thaiv zoo heev, thiab cov khoom siv kho mob zoo.
4,4′-diaminodiphenylmethane (ddm), tseem hu ua methylene dianiline (MDA), yog ib qho tshuaj tsw qab diamine nrog cov tshuaj formula c13h14n2. nws yog ib qho khoom nyob rau hauv chav tsev kub thiab feem ntau yog siv los ua tus neeg sawv cev kho rau epoxy resins hauv siab - daim ntawv thov kev ua tau zoo. Cov qauv aromatic ntawm ddm pab txhawb kev txhim kho thermal thiab tshuaj tiv thaiv ntawm kho epoxy network.
4,4′-diaminodiphenylmethane (ddm) yog ib qho tshuaj tua kab mob zoo rau epoxy resins, muab qhov zoo xws li tg siab, tshuaj tiv thaiv zoo heev, thiab cov khoom siv zoo. ddm-kho epoxy coatings yog dav siv nyob rau hauv ntau yam kev siv, nrog rau siab -kev ua tau zoo txheej, adhesives, thiab composites. Tsab ntawv xov xwm no tau muab cov ntsiab lus nthuav dav ntawm cov txiaj ntsig ntawm ddm ntawm kev kho cov kinetics, thermal stability, mechanical zog, tshuaj tsis haum, thiab kev ua haujlwm tiv thaiv corrosion ntawm epoxy coatings. cov ntaub ntawv nthuav tawm hauv tsab xov xwm no tuaj yeem siv los qhia kev xaiv thiab siv ddm ua tus neeg sawv cev kho rau epoxy txheej hauv ntau daim ntawv thov. Kev tshawb fawb ntxiv yog xav tau los tshawb txog kev siv ddm ua ke nrog lwm cov tshuaj tua kab mob thiab cov tshuaj ntxiv txhawm rau txhim kho kev ua haujlwm ntawm epoxy txheej.
