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This paper treats some theoretical premises determining peculiarities of acetylene polymerization and properties of polyene systems containing carboxy groups. Some kinetic mechanisms of the radiation polymerization of propiolic acid in the liquid phase were experimentally studied. It is shown that solid‐state polymerization of propiolic acid leads to the formation of the polymer with a higher molecular mass and greater effective conjugate length. The solid‐state polymerization of propiolic acid salts illustrates the dependence of the inclination to polymerization of ion metal radius. Some properties of polypropiolic acid and its salts were investigated, in particular, their inclination to photochemical reactions. A certain influence of the polyconjugate system and of the type of polyene chain configuration on the polypropiolic acid property as polyelectrolyte was discovered.

The influence of water on the polymerization of thiirane and 2-methylthiirane with CdCO, was studied. The polymerization process takes place only when a large interface monomerwater is formed. This is achieved by the presence of an amount of water in the reaction mixture which is comparable with that of the monomer. The polarity of the solvent does not influence the rate of formation of poly(2-methylthiirane). The polymerization is carried out in the mass of monomer or in the presence of an alcohol and a solvent not miscible with water.