xov xwm

photoinitiator

Photoinitiator, tseem hu ua photosensitizer lossis photocuring tus neeg sawv cev, yog ib hom khoom siv hluavtaws uas tuaj yeem nqus tau lub zog ntawm qee qhov wavelength hauv cheeb tsam ultraviolet (250 ~ 420nm) lossis thaj tsam pom (400 ~ 800nm) thiab tsim cov dawb radicals thiab cations.
Txhawm rau pib monomer polymerization ntawm cross-linked cured compounds.

Tus thawj molecule muaj lub peev xwm nqus lub teeb hauv thaj tsam ultraviolet (250-400 nm) lossis pom thaj tsam (400-800 nm).Tom qab absorbing lub teeb lub zog ncaj qha los yog tsis ncaj, tus pib molecule hloov los ntawm lub hauv av xeev mus rau ib tug zoo siab singlet xeev, thiab ces dhia mus rau lub zoo siab triplet xeev los ntawm lub intersystem.
Tom qab zoo siab singlet lossis triplet xeev tau txais cov tshuaj lom neeg monomolecular lossis bimolecular tshuaj, cov khoom tawg yooj yim uas tuaj yeem pib polymerization ntawm monomers raug tsim, thiab cov khoom tawg no tuaj yeem yog dawb radicals, cations, anions, thiab lwm yam.
Raws li cov txheej txheem pib sib txawv, photoinitiators tuaj yeem muab faib ua dawb radical polymerization photoinitiators thiab cationic photoinitiators, ntawm cov dawb radical polymerization photoinitiators yog cov siv dav tshaj plaws.