A acrylonitrile-maleic anhydride copolymer was pre-pared by precipitation polymerization with(NH<sub>4</sub>)<sub>2</sub>S<sub>2</sub>O<sub>8</sub>-NaHSO<sub>3&l...A acrylonitrile-maleic anhydride copolymer was pre-pared by precipitation polymerization with(NH<sub>4</sub>)<sub>2</sub>S<sub>2</sub>O<sub>8</sub>-NaHSO<sub>3</sub> as oxidation-reduction initiator in water.The effects of polymerization conditions(such as contentof adjustment reagent of molecular weight,concentrationof monomers,reaction time and temperature,ratio ofinitiator to monomer and ratio of reductant to oxidizer inmole)on composition,molecular weight and conversionof the copolymer were investigated.The copolymer wascharacterized with IR and Elementary Analysis.Its ther-mal property and crystallinity were determined with DTAand WAXD,respectively.展开更多
文摘A acrylonitrile-maleic anhydride copolymer was pre-pared by precipitation polymerization with(NH<sub>4</sub>)<sub>2</sub>S<sub>2</sub>O<sub>8</sub>-NaHSO<sub>3</sub> as oxidation-reduction initiator in water.The effects of polymerization conditions(such as contentof adjustment reagent of molecular weight,concentrationof monomers,reaction time and temperature,ratio ofinitiator to monomer and ratio of reductant to oxidizer inmole)on composition,molecular weight and conversionof the copolymer were investigated.The copolymer wascharacterized with IR and Elementary Analysis.Its ther-mal property and crystallinity were determined with DTAand WAXD,respectively.