Abstract
Copolymerization of vinyl chloride with maleic anhydride was carried out at temperatures lower than zero degree. Owing to the fact that maleic anhydride is easily hydrolized or alcoholized in methanol-water solution even at low temperature, it was necessary to dissolve the anhydride in the water-insoluble solvent and to add this solution successively into the polymerizing system. The copolymer thus obtained showed some moisture absorption and good dyeability to cationic dyestuffs. The heat shrinkage of the fiber made from the copolymer showed nearly the same in hot air as that of the polyvinyl chloride fiber (polymerized at the same temperature), but it was greater in hot water. Films made from the copolymers were treated in hot water, and analyzed by IR spectroscopy. The characteristic absorption bands of maleic anhydride (1860 and 1780cm-1) decreased with immersion time, while the characteristic bands of carboxylic acid (1740 and 1715cm-1) became stronger with immersion time.
