litaba

photoinitiator

Photoinitiator, eo hape e tsejoang e le photosensitizer kapa photocuring agent, ke mofuta oa ntho ea maiketsetso e khonang ho monya matla a maqhubu a itseng sebakeng sa ultraviolet (250 ~ 420nm) kapa sebakeng se bonahalang (400 ~ 800nm) mme e hlahisa li-radicals le cations mahala.
Ho qala polymerization ea monomer ea metsoako e phekotsoeng e amanang le sefapano.

Molek'hule oa initiator o na le bokhoni bo itseng ba ho monya leseli sebakeng sa ultraviolet (250-400 nm) kapa sebaka se bonahalang (400-800 nm).Ka mor'a ho monya matla a khanya ka ho toba kapa ka tsela e sa tobang, molek'hule ea initiator e fetoha ho tloha sebakeng sa fatše ho ea sebakeng se thabileng sa singlet, ebe e tlolela sebakeng se thabisang sa triplet ka har'a tsamaiso.
Kamora hore linaha tse hlasimollang tsa singlet kapa triplet li be le karabelo ea lik'hemik'hale tsa monomolecular kapa bimolecular, ho hlahisoa likhechana tse sebetsang tse ka qalang polymerization ea li-monomers, 'me likhechana tsena tse sebetsang e ka ba li-radicals tsa mahala, cations, anions, joalo-joalo.
Ho ea ka mekhoa e fapaneng ea ho qala, li-photoinitiators li ka aroloa ka li-photoinitiators tsa mahala tsa polymerization le li-cationic photoinitiators, tseo har'a tsona li-photoinitiators tsa mahala tsa polymerization li sebelisoang ka ho fetisisa.