Developing high-efficient,multi spectral applicable one-component macrophotoinitiators(Macro-PIs)with excellent performance that can simultaneously initiate cationic polymerization(CP),free radical polymerization(FRP)...Developing high-efficient,multi spectral applicable one-component macrophotoinitiators(Macro-PIs)with excellent performance that can simultaneously initiate cationic polymerization(CP),free radical polymerization(FRP),and hybrid polymerization(HP)has been a charming research direction.Herein,we synthesized a novel cationic macro-PI(P-CSS)by copolymerizing polymerizable coumarin sulfonium salt(CSS)and methyl methacrylate(MMA).Photochemical and photophysical investigations indicated that the extraordinary absorption ability and the 50 nm redshift of P-CSS may be due to chromophores aggregating on the side chain.Photopolymerization kinetics studies established that P-CSS has effective initiating ability for FRP and CP both under LED@365,405 nm and under Laser@980 nm(with upconversion particles,UCPs).The migration stability experiments showed that the migration rate of P-CSS in trimethylolpropane triacrylate(TMTPA)polymer is 1.25%of CSS,and in 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate(EPOX)polymer is 1.96%.These results indicate the great potential of P-CSS in preparing biosafety and environmentally friendly polymers for packaging and biological materials.展开更多
基金financial support by the National Natural Science Foundation of China(Nos.22301107,52373057)Nature Science Foundation of Jiangsu Province(No.BK20242080)+1 种基金Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,Jiangnan University(No.1042050205243170/008)State Key Laboratory of Molecular Engineering of Polymers,Fudan University(No.K2024-39).
文摘Developing high-efficient,multi spectral applicable one-component macrophotoinitiators(Macro-PIs)with excellent performance that can simultaneously initiate cationic polymerization(CP),free radical polymerization(FRP),and hybrid polymerization(HP)has been a charming research direction.Herein,we synthesized a novel cationic macro-PI(P-CSS)by copolymerizing polymerizable coumarin sulfonium salt(CSS)and methyl methacrylate(MMA).Photochemical and photophysical investigations indicated that the extraordinary absorption ability and the 50 nm redshift of P-CSS may be due to chromophores aggregating on the side chain.Photopolymerization kinetics studies established that P-CSS has effective initiating ability for FRP and CP both under LED@365,405 nm and under Laser@980 nm(with upconversion particles,UCPs).The migration stability experiments showed that the migration rate of P-CSS in trimethylolpropane triacrylate(TMTPA)polymer is 1.25%of CSS,and in 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate(EPOX)polymer is 1.96%.These results indicate the great potential of P-CSS in preparing biosafety and environmentally friendly polymers for packaging and biological materials.
