Yuav ua li cas rubbery lub xeev ua haujlwm
Lub khob hloov kub (Tg) ntawm roj hmab qis dua chav sov, nws yog nyob rau hauv lub xeev qhov teeb meem siab ntawm chav tsev kub, thiab qhov siab tshaj qhov sib txuas thiab cov kab hluav taws xob ci ntsa iav tuaj yeem nyob rau hauv lub xeev qhov kub siab thaum qhov kub siab dua Tg. Highly crosslinked thiab me me molecular phaus polymers tsis muaj siab elasticity. Thaum lub zog sab nraud raug tshem tawm, molecular saw cov qauv hauv lub network yuav rov qab cov xov tooj ntawm cov saw hlau ua ntej kev ncab, ua rau cov roj hmab thim rov qab, thiab kev deformation ploj. Lub sijhawm no, cov entropy nce ntxiv, yog li tsis zoo li Hook Elasticity, rubber elasticity yog entropy elasticity. Thaum lub sijhawm hloov txheej txheem, qhov hloov ntawm entropy yog qhov tseem ceeb, thiab kev hloov pauv lub zog sab hauv yog qhov me.