Abstract
The solvent power of dimethylsulfoxide was compared with that of dimethylformamide for the following polymers: polyacrylonitrile, acrylonitrile-methylacrylate copolymers, polyvinylalcohol, polyvinylchloride, polyvinylacetate, polymethylacrylate and polystyrene. Solubility of the heat-treated films, intrinsic viscosity and the “dilution ratio”of the solutions were used as a measure of the solvent power. It was found that dimethylsulfoxide is better solvent than dimethylformamide for the polymers having great cohesive energy density, such as polyvinylalcohol and polyacrylonitrile.
