Photoinitiated ring opening polymerization of epoxidized

Photoinitiated Ring-Opening Polymerization of Epoxidized Polyisoprene... 

Photoinitiated cationic polymerization has been the subject of numerous reviews. Cationic polymerization initiated by photolysis of diaryliodonium and triarylsulfonium salts was reviewed by Crivello [25] in 1984. The same author also reviewed cationic photopolymerization, including mechanisms, in 1984 [115]. Lohse et al. [116], reviewed the use of aryldiazonium, diphenyliodonium, and triarylsufonium salts as well as iron arene complexes as photoinitiators for cationic ring opening polymerization of epoxides. Yagci and Schnabel [117] reviewed mechanistic studies of the photoinitiation of cationic polymerization by diaryliodonium and triarylsulfonium salts in 1988. Use of diaryliodonium and sulfonium salts as the photoinitiators of cationic polymerization and depolymerization was again reviewed by Crivello [118] in 1989 and by Timpe [10b] in 1990. 

S,S-Dialkyl-S-(hydroxyphenyl)sulfonium salts are active photoinitiators for the cationic ring-opening polymerizations of a wide variety of heterocyclic monomers, including tetrahy-drofuran, s-caprolactone, epoxides, oxetanes, thiiranes, and 1,3,5-trioxane. It has been suggested that ring-opening... 

The area receiving the most intense investigation has been the photoinitiated cationic ring opening polymerization of multifunctional epoxides. This field has been reviewed in several current articles gy ject of a great... 

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