Kev faib tawm ntawm kev siv Epoxy hmoov txheej

Cov tshuaj tua kab mob tuaj yeem muab faib ua cov tshuaj tua kab mob hauv chav tsev thiab cov cua sov kho raws li lawv siv. Epoxy resins feem ntau muaj kev ua tau zoo heev thaum kho ntawm qhov kub thiab txias, tab sis cov txheej thiab cov nplaum siv hauv kev tsim vaj tsev thiab kev tsim kho yuav tsum tau kho chav sov vim qhov nyuaj ntawm cua sov; Yog li ntawd, feem ntau ntawm lawv siv fatty amines, alicyclic amines thiab polyamides, tshwj xeeb tshaj yog cov coatings thiab adhesives siv nyob rau hauv lub caij ntuj no yuav tsum tau siv nyob rau hauv ua ke nrog polyisocyanates, los yog siv polyols nrog ib tug ntxhiab tsw.
Raws li rau nruab nrab kub curing agents thiab kub curing agents, lawv yuav tsum tau xaiv raws li lub tshav kub tsis kam ntawm lub cev thiab lub tshav kub tsis kam, adhesion thiab tshuaj tsis kam ntawm cov khoom kho. Kev xaiv tsom mus rau polyamines thiab acid anhydrides. Txij li cov khoom siv kho mob acid anhydride muaj cov khoom siv hluav taws xob zoo heev, lawv tau siv dav hauv cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob.
Aliphatic polyamine kho cov khoom muaj adhesion zoo, alkali tsis kam thiab dej tsis kam. Aromatic polyamines kuj zoo heev hauv tshuaj tiv thaiv. Txij li thaum lub ntsiab lus nitrogen ntawm cov amino pawg tsim ib daim ntawv cog lus hydrogen nrog cov hlau, nws muaj kev tiv thaiv zoo heev. Qhov siab dua qhov loj ntawm cov amine, qhov zoo dua cov nyhuv anti-xeb. Acid anhydride curing agents tsim ester bonds nrog epoxy resins, qhia siab tiv thaiv cov organic thiab inorganic acids, thiab lawv cov khoom hluav taws xob feem ntau tshaj cov polyamines.