Crystalization ntawm polymers yog txheej txheem cuam tshuam nrog ib feem ntawm lawv cov saw hlau molecular. Cov hlua khi no khi ua ke thiab tsim cov cheeb tsam hu ua lamellae, uas tsim cov spheroidal loj dua lub npe hu ua spherulites.
Cov khoom siv semicrystalline yog dab tsi?
cov ntaub ntawv semi-crystalline muaj cov qauv molecular uas tau txiav txim siab nrog cov ntsiab lus yaj zoo. Lawv tsis maj mam muag nrog qhov kub thiab txias, es tsis txhob, cov ntaub ntawv semi-crystalline nyob twj ywm kom txog rau thaum ib qho kom muaj cua sov tau nqus thiab tom qab ntawd hloov sai sai rau hauv cov kua viscosity tsawg.
YPuas yog polymers Semicrystalline?
Polymers yog tsim los ntawm cov saw hlau ntev molecular uas tsim tsis xwm yeem, entangled coils hauv cov yaj. … Yog li ntawd, nyob rau hauv cov cheeb tsam txiav txim, cov saw hlau polymer yog ob qho tib si sib dhos thiab folded. Cov cheeb tsam ntawd tsis yog crystalline lossis amorphous thiab raug cais raws li semicrystalline.
Amorphous thiab crystalline polymer yog dab tsi?
Amorphous polymers yog cov polymers uas tsis muaj crystalline cheeb tsam thiab tsis muaj cov khoom sib xyaw ua ke. … Yog li, qhov sib txawv tseem ceeb ntawm amorphous thiab crystalline polymers yog tias amorphous polymers tsis muaj cov khoom sib xyaw ua ke thaum crystalline polymers muaj cov khoom sib xws.
Dab tsi yog ib qho semi-crystalline polymer muab piv txwv?
Nrov thermoplastics siv hauv kev lag luam ntim xws li HDPEthiab polypropylene, raug cais ua ib nrab-crystalline, thaum lwm tus xws li polystyrene thiab ABS, suav tias yog amorphous.
