Abstract
A description is given of results obtained from a study of kinetic and molecular weight dependences of polymerization of epoxides (propylene oxide, epichlorhydrin, glycide alcohol nitrate) on oxonium and carbonium salts. It was shown that during initiation of polymerization of epoxides using oxonium and carbonium salts transition takes place during the process to catalysis with a corresponding Lewis acid. This has the result that polymerization of epoxides by the action of these initiators has many common features with polymerization of epoxides using Lewis acids. On all types of catalyst the process is accompanied by the loss of active centres, chain transfer and ring formation, which results in the distribution of polymers formed according to molecular weights and the type of functionality.
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