氯化镁与甘油对HES/PVA共混材料结构与性能的影响  

The Effect of Magnesium Chloride and Glycerol on the Structure and Properties of HES/PVA Blend Films

作　　者：徐斌[1] 赵乾[1] 姜黎[1] 张熙[1] 

机构地区：[1]高分子材料工程国家重点实验室,四川大学高分子研究所,四川成都610065

出　　处：《塑料工业》2015年第6期61-65,82,共6页China Plastics Industry

基　　金：国家自然科学基金(51273129)

摘　　要：以氯化镁(MgCl2·6H2O)/甘油为复配增塑剂,采用流延法制备了改性的羟乙基淀粉(HES)/聚乙烯醇(PVA)复合膜,并研究了氯化镁、甘油对HES/PVA复合膜结构与性能的影响。研究结果表明,Mg Cl2·6H2O/甘油可与HES/PVA基体发生相互作用,破坏了HES以及PVA分子链内和分子链间的氢键,从而破坏了HES/PVA的结晶结构,降低了HES/PVA的结晶度。因此,复配增塑剂的加入能够提高HES与PVA的相容性。同时Mg Cl2·6H2O/甘油在复合膜中能起到增塑作用,表现为拉伸强度、拉伸模量下降,断裂伸长率上升。Hydroxyethyl starch （ HES ）/Poly （ vinyl alcohol ） （ PVA ） films modified with magnesium chloride hexahydrate （MgCl2 · 6H2O）/glycerol as complex modifier were prepared by casting method, and effects of magnesium chloride hexahydrate and glycerol on structure and properties of HES/PVA blend films were researched. The results showed that, the interaction hetween MgCl2 · 6H2O/glycerol could interact with HES/PVA matrix, which destroyed the hydrogen bonding of intramolecular and intermolecular between HES and PVA chains. As a result, the crystal structure of HES/PVA was destroyed and the crystallinity of lIES/ PVA was decreased. So, the compatibility between lIES and PVA improved with the addition of MgCl2 @ 6H2O. And MgCl2 @ 6H2 O/glycerol could act as plasticizer in the blend film, which decreased the tensile strength and tensile modulus and increased the elongation at break of the blend film.

关 键 词：羟乙基淀粉 聚乙烯醇 氯化镁 甘油 拉伸性能 

分 类 号：TB33[一般工业技术—材料科学与工程] TQ320.1[化学工程—合成树脂塑料工业]