【摘要】 以铬酸为引发剂 ,将甲基丙烯酸甲酯 (MMA)与苎麻纤维进行接枝共聚 ,探讨了接枝条件对接枝共聚的影响 .结果表明 ,Cr6 + 引发 MMA与苎麻接枝共聚的最佳条件为 :[Cr6 + ]=0 .0 0 7mol· L- 1 ,反应时间 =12 h,反应温度为 5 0℃ ,[HNO3]=1mol· L- 1 ,[MMA]=0 .7m ol· L- 1 ,纤维素用氢氧化钠溶液和乙二胺溶胀可提高接枝率 .更多还原

【Abstract】 Graft copolymerization of methyl methacrylate (MMA) onto ramie fibers has been carried out with chromic acid as initiator. The effects of the concentrations of chromic acid, MMA and temperature as well as time of polymerization on the graft ratio, yield of homopolymer have been examined. The optimum conditions of grafting are: concentration of chromic acid 7×10 -3 mol·L -1 , of MMA 0.7 mol·L -1 , of HNO 3 1 mol·L -1 , temperature 50℃ and time 12 h.更多还原