聚乙烯醇／壳聚糖合金膜的相容性

Compatibility of Polyvinyl alcohol / Chitosan Alloy Membrane

摘要: 本文通过 WAXD、DSC动态力学和应力一应变测量对 PVA/CS合金膜的聚集态结构进行了研究。发现,合金膜中的PVA结晶完善性变差,结晶度和结晶熔融峰温度随CS含量增加而降低。合金膜中的CS晶型发生了转化。动态力学损耗谱显示,合金膜中仍保持单组分的玻璃化松弛。当PVA含量大于50%％时,两个Tg峰中间产生一新的力学损耗峰。合金膜的模量和断裂强度高于单组分,而断裂伸长率低于单组分,这都表明,PVA与CS间存在强的相互作用,该共混体系为部分相容体系。

Abstract: The aggregated state structure and mcchanical properties of polyvinylalcohol(PVA)/chitosan(CS) alloy membrane were studied by WAXD, DSC,dynamic--mechanic and stress--strain measurments. It was found that the crystallinity and crystal melting temperature o