壳多糖与丙烯酸丁酯的乳液接枝共聚研究

STUDY ON THE EMULSION GRAFT COPOLYMERIZATION OF BUTYL ACRYLATE ONTO CHITOSAN

以十二烷基苯磺酸钠为乳化剂，过硫酸钾－亚硫酸氢钠为引发剂，研究了壳多糖与丙烯酸丁醋的乳液共聚合，结果表明当［Ｋ２Ｓ２Ｏ８］＝［ＮａＨＳＯ３］＝２．５７×１０－３ｍｏｌ·１－１，［ＢＡ］＝０．６８ｍｏｌ．１－１，［Ｃｈｉｔｏｓａｎ］＝１９．２ｇ·ｌ－１，在７０℃下反应５小时，共聚反应的接技率和接枝效率均较高．用红外光谱，差热分析，Ｘ射线衍射，扫描电镜对接技共聚物进行了表征，此外测试了共聚物胶乳成膜的机械性能，表明用丙烯酸丁酯对壳多糖进行接枝改性，可提高壳多糖的韧性，扩大其应用范围．

he emulsion graft copolymerization of butyl acrylate onto chitosan was investigated, using KPS/NaHSO3 as a redox initiator, sodium dodecy benzene sulfonate as emulsifier. It was found that the percentage of graft, efficiency of graft and homopolymer depended on chitosan content, KPS/NaHSO3, BA concentrations,reaction time, reaction temperature. The grafted copolymer was identified by IR, SEM,X-ray diffraction diagrams. The films formed from copolymer emulsion were tested and the results show that the elongation ratio of chitosan film will be increased by emulsion graft copolymerization with butyl acrylate.