K. Tsuda, Shigeru Kobayashi, T. Otsu
Sep 1, 1965
Citations
0
Influential Citations
17
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
A study has been made to see how some sulfides, such as diphenyl disulfide, diphenyl sulfide, dibenzyl disulfide, and dibenzyl sulfide, and such oxides as diphenyl ether and dibenzyl ether affect the radical polymerization of styrene or methyl methacrylate. None of these compounds acted effectively either as an initiator or as a retarder in the thermal polymerization at 60°C. When employed as photo-sensitizers, the disulfides have been proven to have a remarkable activity of initiation, the monosulfides acting less effectively as initiators. Moreover, the oxides showed no such activity at all. When sulfides were used as photo-sensitizers, the rate of polymerization did not obey the equation of the square root of the concentrations of the sulfides. This may be attributable to the participation of the sulfide radicals in the initiation and termination. The chain transfer constants of these compounds at 60°C were in the order of disulfides>monosulfides>oxides.