氯化锂对聚乙烯醇材料性能的影响  

Effect of Lithium Chloride on the Properties of PVAMaterials

作　　者：雷杨[1,2] 张敏敏[1] 秦舒浩[1] 宋亚平[1,2] 郝智[1,2] 

机构地区：[1]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014 [2]贵州大学材料与冶金学院,贵州贵阳550003

出　　处：《塑料科技》2012年第7期72-74,共3页Plastics Science and Technology

基　　金：贵州省科技计划项目(2010[5005]);贵州省教育厅自然科学基金项目(2010[009])

摘　　要：通过熔融共混挤出的方式,采用氯化锂(LiCl)对聚乙烯醇(PVA)进行改性,制备了PVA/LiCl复合材料,并运用傅里叶红外光谱法、差示扫描量热法和X射线衍射法等分析方法,研究了不同含量的LiCl对PVA的结晶行为和力学性能的影响。结果表明:LiCl中的Li+与PVA中的羟基产生络合作用,破坏了PVA中原有的氢键,降低了PVA分子链排列的规整性。随着LiCl含量的增加,复合材料的熔点、拉伸强度降低,断裂伸长率略微上升。Polyvinyl alcohol was modified by lithium chloride,the composite material of polyvinyl alcohol and lithium chloride was prepared by melt blend extrusion method.The effects of different amounts of lithium chloride on the crystal structure and the mechanical property of polyvinyl alcohol were studied.The experimental results of DSC,XRD and FTIR show that： the Li＋ in lithium chloride destroys original hydrogen bonds of polyvinyl alcohol,has a complex effect on polyvinyl alcohol,and reduces the regularity of polyvinyl alcohol molecular chains arrangement.With the increase of the lithium chloride content,the melting temperature and tensile strength of the composite decrease,and the elongation at break increases.

关 键 词：聚乙烯醇 氯化锂 氢键 结晶 熔融温度 

分 类 号：TQ325.9[化学工程—合成树脂塑料工业]