izindaba

i-photoinitiator

I-Photoinitiator, eyaziwa nangokuthi i-photosensitizer noma i-ejenti ye-photocuring, iwuhlobo lwe-ejenti yokwenziwa ekwazi ukumunca amandla e-wavelength ethile endaweni ye-ultraviolet (250 ~ 420nm) noma isifunda esibonakalayo (400 ~ 800nm) futhi ikhiqize ama-radicals mahhala nama-cations.
Ukuqala i-monomer polymerization yamakhompiyutha aphulukisiwe axhumene.

I-molecule ye-initiator inekhono elithile lokumunca ukukhanya endaweni ye-ultraviolet (250-400 nm) noma isifunda esibonakalayo (400-800 nm).Ngemva kokumunca amandla okukhanya ngokuqondile noma ngokungaqondile, i-molecule yesiqalisi iyashintsha isuka endaweni ephansi iye endaweni ejabulile ye-singlet, bese igxumela kusimo se-triplet esijabulisayo ngokusebenzisa i-intersystem.
Ngemuva kokuthi i-singlet ejabulile noma i-triplet state ibhekane nokusabela kwamakhemikhali e-monomolecular noma i-bimolecular, izingcezu ezisebenzayo ezingaqala i-polymerization yama-monomers ziyakhiqizwa, futhi lezi zingcezu ezisebenzayo zingaba ama-radicals mahhala, ama-cations, anions, njll.
Ngokwezinqubo zokuqalisa ezihlukene, ama-photoinitiators angahlukaniswa abe ama-photoinitiators we-polymerization mahhala kanye nama-cationic photoinitiators, phakathi kwawo ama-photoinitiators amahhala we-polymerization asetshenziswa kakhulu.