Photoinduced ionic polymerization. VII. Cationic polymerization of cyclohexene oxide in solid state

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Abstract
Photopolymerization of cyclohexene oxide in the presence of electron acceptors was studied in a bulk system (in liquid as well as in solid states). The polymerization was proved to proceed by a cationic mechanism in both states by the effect of inhibitors. In a liquid phase the light intensity dependence of the rate of polymerization and the molecular weight distribution showed a contribution of a free ionic polymerization. Any discontinuous phenomenon in the rate as well as in the molecular weight was not discerned between liquid(above −36°C) and plastic crystal (between −36 and −81°C) phases. A quantum yield of monomer consumption as high as 8 × 103 was observed in the plastic crystal phase. Below −81°C in the normal crystal phase the rate as well as the molecular weight was remarkably suppressed.