Thaum tham txog cov yam ntxwv ntawmkub - yaj cov nplaumHauv cov chaw tsawg - qhov chaw dej kub, "embrittlement" yog qhov teeb meem tseem ceeb. Feem ntau, kub - yaj adhesives zoo li los ua nkig vim tsawg kub.
Kub - yaj cov nplaum yog tsuas yog muaj cov polymers, sib txuas, waxes, thiab lwm yam. Hauv qhov chaw tsawg - ntsuas kub, lub zog ntawm polymer molecular chains raug txo qis dua, thiab kev txav ntawm cov ntu sib tw ua nyuaj. Qhov no ua rau muaj kev poob zoo nyob rau hauv thawj hloov pauv thiab elasticity ntawm lub kub - yaj adhesive, nrog ib tug loj nce hauv brittleness.
Nqa Eva Kub - yaj Adhesive li ib qho piv txwv. Thaum lub ambient kub poob qis dua hauv qab {{}} degree, nws hardness nce sai heev, thiab nws cov kev hloov tau yooj yim txo qis. Nyob rau hauv lub caij ntuj no nyob rau sab qaum teb cheeb tsam, yog tias cov khoom lag luam nrog Evesive tau muab tso rau sab nraum zoov, qhov kub thiab txias
Txawm li cas los xij, tsis yog txhua tus kub - yaj adhesives yog tsis tshua muaj zog rau embrittlement ntawm tsawg kub. Los ntawm cov qauv tshwj xeeb thiab kev hloov kho, qee qhov kub - yaj adhesives tuaj yeem tswj tau zoo nyob rau hauv tsawg - ib puag ncig ib puag ncig. Piv txwv li, ntxiv cov khoom siv tshwj xeeb lossis elastomers rau covKub - Melt AdhesiveCov mis no tuaj yeem txhim kho nws qhov qis - qhov kub thiab txias. Siab - rhiab kub - melt adhesives, tiv rau lawv cov txheej txheem molecular tshwj xeeb, ua rau lawv haum rau cov xwm txheej muaj qhov ua kom muaj qhov tsawg - qhov kub thiab txias.