KPS-SHS引发丝胶与甲基丙烯酸甲酯接枝共聚的研究  

Graft Copolymerization of Silk Sericin and Methyl Methacrylate Initiated by Potassium Persulphate-Sodium Sulfite System

作　　者：宋艳[1] 魏德卿[2] 

机构地区：[1]江苏工业学院材料科学与工程学院,江苏常州213164 [2]中国科学院成都有机化学研究所,四川成都610041

出　　处：《江苏工业学院学报》2008年第1期13-16,共4页Journal of Jiangsu Polytechnic University

摘　　要：采用过硫酸钾(KPS)-亚硫酸氢钠(SHS)氧化还原引发体系,在水介质中,引发丝胶(SS)和甲基丙烯酸甲酯(MMA)进行接枝聚合,借助FTIR对接枝共聚物进行表征,结果表明MMA被成功接枝到SS大分子链上。此外,考察了单体浓度、引发剂浓度、反应温度和时间对接枝聚合反应的影响,在保持丝胶质量浓度为10 g/L不变的情况下,得到接枝聚合反应的最佳聚合条件如下:[MMA]=0.4 mol/L;[KPS]=[NaHSO3]=6.25×10-4mol/L;t=70℃;t=60 min,并提出了可能的接枝聚合机理。Graft copolymerization of silk sericin （SS） and methyl methacrylate （MMA） were carried out initiated by potassium persulphate--sodium sulfite redox system in aqueous medium. FT--IR of graft copolymers showed that methyl methacrylate was successfully grafted onto silk sericin. The effects of concentrations of MMA and initiator, reaction temperature and time on the grafting parameters of the copolymerization were studied in detail. Taking grafting percentage and grafting efficiency as functions, the optimum reaction conditions were obtained as follows. [MMA] =0.4 mol/L, [KPS] = [NaHSO3] =6.25 ×10^-4mol/L, t=70 ℃, t=60 min. Furthermore, a possible initiation mechanism was proposed.

关 键 词：氧化还原体系 丝胶 甲基丙烯酸甲酯 接枝共聚 

分 类 号：TB324[一般工业技术—材料科学与工程]