【摘要】 本文以硝酸铈铵为引发剂，研究了单体浓度、引发剂用量、反应温度和反应时间对淀粉与甲基丙烯酸甲酯（ＭＭＡ）接枝共聚反应特征参数的影响。当引发剂浓度为４．５×１０（－３）Ｍ／Ｌ，ＭＭＡ浓度为０．２２５Ｍ／Ｌ，在３０℃反应３．５ｈ时，单体转化率Ｃ％＝９０．５％，接枝率Ｇ％＝６２％，接枝效率ＧＥ％＝７０％，接枝支链的粘均分子量Ｍ＝×１０（－３）。接枝共聚物及其与聚氯乙烯（ＰＶＣ）共混物浇铸成膜后，用黑曲霉在无机盐营养培养基中降解４０天，失重率分别为３２％和２３％，表明淀粉／ＭＭＡ接枝共聚物可作为生物降解塑料使用。更多还原

【Abstract】 Graft copolymer of corn starch and methyl methacrylate(MMA) was synthesed with ceric ammonium nitrate as initiator.The effect of monomer concentration,initiator concentration, reaction temperature and reaction time on monomer conversion (C%), grafting efficiency(GE%)and grafting(G%) has been also studied. The C%, GE% and G% approached the maximum of 90% ,70% and 62% as the monomer concentration and initiator concentration were raised to 0. 225 M·L(-1)and 4. 5×10(-3)M·L(-1) at 30℃ for 3.5 h respectively.The graft copolymer and its blending product with polyethylene chloride(PVC) show excellent susceptibility to fungal growth.Graft copolymer sample losing more than 32% of its weight after 40 day of incubation with Aspergillus niger and the blending product sample losing 2 3%. The result of biodegradation show that the copolymer and the blending may have application as a biodegradable plastic.更多还原