photoinitiator
Photoinitiator, inozivikanwawo se photosensitizer kana photocuring agent, imhando yemhando yekugadzira iyo inogona kutora simba reimwe wavelength munharaunda yeultraviolet (250 ~ 420nm) kana dunhu rinoonekwa (400 ~ 800nm) uye kuburitsa mahara radicals uye cations.
Kutanga monomer polymerization ye-cross-yakabatanidzwa yakaporeswa makomisheni.
Iyo initiator molecule ine imwe mwenje yekunyudza kugona munzvimbo yeultraviolet (250-400 nm) kana dunhu rinoonekwa (400-800 nm).Mushure mekutora simba rechiedza zvakananga kana zvisina kunanga, iyo yekutanga molecule inoshanduka kubva pasi pasi kuenda kune inonakidza singlet state, uyezve inosvetukira kune inonakidza katatu nyika kuburikidza neiyo intersystem.
Mushure mekunakidzwa kwe singlet kana katatu nyika inoitwa monomolecular kana bimolecular kemikari maitiro, zvidimbu zvinoshanda zvinogona kutanga polymerization yemamonomers zvinogadzirwa, uye izvi zvidimbu zvinoshanda zvinogona kuve zvemahara radicals, cations, anions, nezvimwe.
Zvinoenderana nemagadzirirwo akasiyana ekutanga, mafotoinitiators anogona kupatsanurwa kuita emahara radical polymerization photoinitiators uye cationic photoinitiators, pakati peiyo yemahara radical polymerization photoinitiators ndiyo inonyanya kushandiswa.
Nguva yekutumira: Jun-27-2022