kev txheeb xyuas cov yas pom
Los ntawm kev soj ntsuam cov tsos ntawm cov yas, peb muaj peev xwm ua ntej taw cov khoom ntawm cov khoom yas: thermoplastic, thermosetting yas lossis elastomer.
Feem ntau thermoplastic plastics muaj ob hom: crystallization thiab amorphous.
Crystalline plastics yog cov duab nyob rau hauv cov tsos, opacified los yog opaque, pob tshab nkaus xwb nyob rau hauv lub xeev daim nyias nyias, los ntawm muag kom horny.
Amorphous daim ntawv tsis muaj feem xim, feem ntau yog tsis ntxiv additive, nws yog tag nrho cov pob tshab, hardness ntawm tawv los horny roj hmab zoo (feem ntau yog ntxiv cov yas rau yas thiab lwm yam khoom siv ntxiv).
Cov tshuaj txaj hluav taws xob feem ntau yog ua tiav thiab muaj roj, thiab yog pob tshab yog tias tsis ntim khoom.
Tus elastomer muaj ib qho kev xav zoo li roj hmab thiab muaj ib qho qis npaum li cas.