iindaba

ifotoinitiator

I-Photoinitiator, eyaziwa ngokuba yi-photosensitizer okanye i-agent ye-photocuring, luhlobo lwe-agent yokwenziwa ekwazi ukufumana amandla e-wavelength ethile kummandla we-ultraviolet (250 ~ 420nm) okanye ummandla obonakalayo (400 ~ 800nm) kwaye uvelise i-radicals yamahhala kunye ne-cations.
Ukuqalisa i-polymerization ye-monomer yeekhompawundi ezidibeneyo ezidibeneyo.

I-molecule ye-initiator inamandla athile okukhanyisa ukukhanya kummandla we-ultraviolet (250-400 nm) okanye ummandla obonakalayo (400-800 nm).Emva kokufunxa amandla okukhanya ngokuthe ngqo okanye ngokungathanga ngqo, i-molecule ye-initiator itshintsha ukusuka kumhlaba ophantsi ukuya kwimeko evuyayo ye-singlett, kwaye emva koko ixhumele kwi-triplet state echulumancisayo ngokusebenzisa i-intersystem.
Emva kokuba i-singlet eyonwabileyo okanye i-triplet ifumana i-monomolecular okanye i-bimolecular reaction reaction, amaqhekeza asebenzayo anokuqalisa i-polymerization ye-monomers aveliswa, kwaye la maqhekeza asebenzayo anokuba yi-radicals yamahhala, i-cations, anions, njl.
Ngokweendlela ezahlukeneyo zokuqalisa, ii-photoinitiators zinokwahlulwa zibe ziifotonitiators ze-radical radical zasimahla kunye ne-cationic photoinitiators, phakathi kwazo ezona fotoinitiators ze-radical radical free zezona zisetyenziswa kakhulu.