Hauv txoj haujlwm no, peb tshaj tawm hom tshiab ntawm cov khoom siv thermoset uas yog ductile thiab deformable tom qab sib txuas thiab coj zoo li cov thermoplastic thiab txawm tias elastomer ntawm chav tsev kub.
Puas yog lub thermoset ductile?
Thermoset polymer uas feem ntau siv rau ntau daim ntawv thov yog thermoset polyurethane. Cov khoom ntawm thermoset polyurethane suav nrog tias nws is ductile, nrog cov roj hmab uas muaj zog thiab qis iav hloov kub (Tg).
Vim li cas cov thermosetting yas nkig?
Qhov no yog vim qhov tseeb tias cov khoom siv thermoset muaj qhov nruj dua thiab qis dua sab hauv dampening (kev sib txhuam), uas ua rau txo qhov kub thiab txias thaum lub sij hawm thauj khoom. Cov ntaub ntawv thermoset yog feem ntau nkig ntau dua li cov ntaub ntawv thermoplastic.
Dab tsi yog cov khoom ntawm thermosetting yas?
Thermosetting plastics yog tiv taus cua sovTab sis thaum tshav kub kub heev, lawv decompose ua ntej mus txog melting point. Cov no feem ntau nkig nyob rau hauv qhov, vim poob ntawm elasticity thaum cua sov. Thaum molded los yog kho, cov no tsis tuaj yeem rov ua dua los ntawm kev siv cov cua sov.
Qhov txawv ntawm cov thermoplastics thiab cov thermosetting yas yog dab tsi?
Thermosoftening (tseem hu ua thermoplastics) yog yas uas yuav muag thaum cua sov thiab tuaj yeem hloov kho. Thermosetting plastics yog cov yas tsis soften ntawm cua sov. Lawv siv thaum tiv thaiv tshav kub yog ib qho tseem ceeb (xws li kettles, plugs, laptop chargers thiab lwm yam).
