水对交联壳聚糖/聚醚半互穿网络凝胶的玻璃化转变的影响  

STUDY ON THE EFFECT OF WATER ON THE GLASS TRANSITION OF THE CROSSLINKED CHITOSAN/POLYETHER SEMI IPN HYDROGEL

作　　者：管云林[1] 邵蕾[1] 张影萍 刘静[2] 姚康德[2] 

机构地区：[1]天津大学应用化学系 [2]天津大学材料科学与工程系

出　　处：《高分子材料科学与工程》1999年第4期139-140,共2页Polymer Materials Science & Engineering

基　　金：国家自然科学基金

摘　　要：以差示扫描量热（ＤＳＣ）和动态力学分析（ＤＭＡ）研究了交联壳聚糖／聚醚半互穿聚合物网络（Ｃｒ－ＣＳ／ＰＥｓｅ－ｍｉ－ＩＰＮ）水凝胶中水的状态和玻璃化转变，讨论了水的含量和状态对玻璃化转变温度的影响。结果表明，在此水凝胶中存在３种状态水，而水凝胶的玻璃化转变温度随凝胶中不冻结水的含量增大而降低显示水的增塑作用。且用Ｘ射线衍射研究水对此半互穿网络结晶结构的影响。Water state and glass transition of the crosslinked chitosan/polyether semi IPN(Cr CS/PE semi IPN) hydrogels with various water contents were studied using DSC and DMA. The effect of water content and state on the glass transition temperature( T g) of the hydrogel was discussed. Results show that there are three states of water can exist in the hydrogel and only in the region in which the hydrogel contains only non freezing bound water, T g of the hydrogel decreases markedly as the plasticization of water. The effect of water on the crystalline structure of the semi IPN was investigated by using X ray diffraction as well.

关 键 词：壳聚糖 玻璃化转变 聚醚 凝胶 

分 类 号：O631.22[理学—高分子化学] O648.17[理学—化学]