Abstract
Phenacyltriphenyl phosphonium (2) acetyltriphenyl phosphonium (3) nitrobenzyl triphenyl phosphonium (4) bromobenzyltriphenyl phosphonium (5) and phenacyltriphenyl arsonium (6) salts containing the SbF6-anion are useful photoinitiators for cationic polymerization of styrene. Photosensitization of initiator (6) by pyrene enhances the rate of polymerization but by N-methylphenothiazine inhibits the rate of polymerization. The effects of initiator structure, photolysis time and photosensitizer on the rate of polymerization in dichloromethane at 25° are presented. Photopolymerization of methylmethacrylate (MMA) proceeds in the presence of salt 6 to a small extent compared to free radical photopolymerization of MMA alone; also the yield 7 from salt 6 inhibits methylmethacrylate (MMA) polymerization.
| Original language | English |
|---|---|
| Pages (from-to) | 327-336 |
| Number of pages | 10 |
| Journal | Macromolecular Reports - International Rapid Publication Supplement to the Journal of Macromolecular Science-Pure and Applied Chemistry |
| Volume | A30 |
| Issue number | SUPP 3-4 |
| State | Published - Jun 1993 |
ASJC Scopus subject areas
- General Engineering