铈离子引发壳聚糖与MMA接枝共聚的研究  

CERIC ION-INTIIATED GRAFTING OF POGY (METHYL METHACRYLATE) ONTO CHITOSAN

作　　者：杜秀英[1] 张维邦[1] 曾汉民[1] 许家瑞[1] 

机构地区：[1]中山大学材料科学研究所

出　　处：《高分子材料科学与工程》1996年第2期28-32,共5页Polymer Materials Science & Engineering

摘　　要：在乙酸水溶液中，以铈盐为氧化还原引发剂，在氮气存在下，壳聚糖与ＭＭＡ可发生接枝共聚反应。接枝百分比及均聚物百分含量依赖于反应温度、时间和引发剂的浓度，但不依赖于单体的浓度。表观活化能为７４．４ｋＪ／ｍｏｌ。接枝物不溶于壳聚糖的溶剂，在丙酮中发生溶胀现象。Poly(methyl methacrylate)was grafted onto chitosan in an acetic acid solution by using the ceric iun as a redox initiator in the presece of 1.0 mol/L sufric acid and nitrogen, The grafting percentage and percentage of homopolymer turned out to be dependent on reactiun temporature,time,and initiator concentration,but were found to be independant of monomer concentration, The apparent activation energy for the grafting reaction was estimated to be 74.4 kJ/mol. The grafted chitosan is insoluble in solvents for chitosan,but shows enhanced swelling in some organic solvents.

关 键 词：铈离子 壳聚糖 接枝共聚 聚丙烯酸甲酯 引发剂 

分 类 号：O632.52[理学—高分子化学]