Poly(vinyl chloride) reactions with sodium and potassium derivatives of heteroaromatic and aromatic NH- and SH-acids in aprotic solvents

The observed featured and regularities of nucleophilic substitution of chlorine in poly(vinyl chloride) upon its reaction with sodium and potassium derivatives of pyrazole, 3,5-dimethylpyrazole, and 2-thiobenzimidazole, and with sodium thiophenolate have been understood in the frame of hard and soft acids and bases theory.