Cov hnab yas muaj cov yam ntxwv kub kub
1 Tshaj kub: hais txog qhov kub ntawm qhov amorphous polymer hloov ntawm ib lub xeev tshau los mus rau lub xeev khov khiav ceev, uas yog qhov txo qis ntawm kev ua ntsuas kub ntawm amorphous yas. Txoj kev hloov cheeb tsam ntawm lub xeev siab thiab qhov khiav ceev ntawm lub cev ntawm lub polymer hu ua thaj chaw khoob khaus, thiab qhov hloov lub cev hloov yog hu ua qhov kub siab Tf. Cov dej siab Tf yog ib qho tseem ceeb hauv kev txiav txim rau cov tsis tau ntawm lub polymer yaj ua tus txheej txheem.
2 lub ntsuas kub: melting kub yog hais txog qhov kub ntawm qhov khoom los ntawm cov khoom kom ua kua, feem ntau qhia hauv Tm. Rau ib tus crystalline polymer, qhov kub ntawm qhov chaw uas muaj qhov sib txawv ntawm qhov chaw dim pa uas muaj peb sab no ntawm kev siv lub tshuab macromolecular yog hloov mus rau lub xeev uas tsis muaj zog, uas yog hu ua qhov teeb meem ntawm lub cev. Yog qhov qis qis ntawm qhov ua kom sov ntawm crystalline polymer molding
3 iav hloov txoj siab: hais txog cov amorphous polymer nrog rau cov feem xyuam ntawm cov pob txha ntawm crystalline polymer, lub xeev txoj kev hloov ntawm lub xeev iav mus rau lub xeev siab los sis cov qub. Nws yog qhov ntsuas kub qis tshaj plaws rau lub zog dawb ntawm lub tsho me me ntawm amorphous polymer thiab qhov siab tshaj ntawm kev ua haujlwm ntawm qhov khoom. Saum toj no kub, lub polymer tuaj yeem tshwm ci ntawm elasticity; hauv qab no kub, lub polymer tuaj yeem brittleness.
4 Decomposition temperature: hais txog lub polymer nyob rau hauv ib lub xeev khiav ceev, thaum kub kub ntxiv, qhov degradation ntawm molecular saw yog intensified, thiab qhov kub ntawm qhov polymer molecular saw yog ho degraded yog lub decomposition kub.
Tsis tas li ntawd, muaj ib qho uas tsis-ntws, uas yog qhov siab tshaj plaws uas tsis muaj qhov tshwm sim hauv lub siab, thiab yog lub cev muaj nuj nqes los ntawm Tf.
