Nucleating agents yog siv nrog polymers tuaj yeem crystallize thiaj li ua kom lub sijhawm voj voog nrawm. Tom qab melting, nws yog solidification tus nqi ntawm cov yas mus rau hauv ib tug muaj txiaj ntsim zoo uas tswj kev ua thiab lub sij hawm voj voog.
Nucleating agents ua haujlwm li cas?
Nucleating agents txhawb nqa cov crystallization ntawm semi-crystalline polymers. Cov additives no ua haujlwm los ntawm kev nthuav tawm qhov sib txawv ntawm qhov chaw rau cov polymer yaj, ua rau cov txheej txheem crystallization ntau dua thermodynamically.
Cov tshuaj nucleating cuam tshuam dab tsi ntawm cov qauv nplej?
Cov txiaj ntsig tau pom tias nyob rau theem ntawm cov qauv sib sau ua ke, crystallinity nce thiab spherulite loj hlob zuj zus nrog nce nucleating tus neeg sawv cev. Nyob rau tib lub sijhawm, tus neeg sawv cev nucleating kuj muaj qhov cuam tshuam rau ob qho tib si crystal grain qauv thiab chav tsev cell qauv.
Lub ntsiab lus ntawm nucleation yog dab tsi?
Nucleation, txheej txheem thawj zaug uas tshwm sim hauv kev tsim cov siv lead ua los ntawm kev daws, kua, lossis vapour, uas muaj pes tsawg tus ions, atoms, lossis Cov molecules tau teeb tsa nyob rau hauv cov qauv yam ntxwv ntawm cov khoom siv crystalline, tsim ib qhov chaw uas cov khoom ntxiv tau tso rau hauv cov khoom siv lead ua loj hlob.
Koj txhawb nqa nucleation li cas?
Txoj kev siv tshuab: co, tapping lossis siv ultrasound tuaj yeem ua haujlwm zoo rau nucleation, tab sis nyuaj rau tus qauv. Shock txias / tswj tus nqi khov:Kev nthuav tawm cov qauv mus rau qhov ntsuas kub ceev nrawm tuaj yeem txhawb nqa nucleation.
