| Abstract: | The aqueous solution copolymerization of maleic anhydride(MAn), vinyl acetate (VAc) and styrene(St) was carried out by using redox system as initiator. Aqueous MAn solution PH should be adjusted and controlled between 6 and 7 by slow addition of proper amount of aqueous NaOH solution. Initiator used for copolymerization was redox system of K2S2Os-NaHSO3. The polymerization temperature was maintained at 70-72℃ for approximately 7 hours. After polymerization reaction, water in mixture of polymerization was evaporated by means of water bath. The mixture was dried in vacuum desiccator and purified. The product of copoly(MAn-VAc-St) is yellow powder. |
