木质素磺酸钙/聚乙烯醇共混体系的结构与性能  

Structure and Properties of Lignosulfonate Calcium / Polyvinyl Alcohol Blends

作　　者：姜黎[1] 叶德展[1] 张明华[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：《高分子材料科学与工程》2015年第5期32-38,共7页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51273129)

摘　　要：为发展环境友好高分子材料,制备了聚乙烯醇(PVA)与木质素磺酸钙(HLS)的共混材料,研究了HLS对PVA热性能与力学性能的影响以及甘油对HLS/PVA共混薄膜的增塑改性作用。结果表明,HLS与PVA具有较强的相互作用和较好的相容性,可提高PVA的强度和热稳定性、降低PVA的结晶度,25%(质量分数,下同)HLS可使PVA的拉伸强度和热稳定性分别提高165%和20℃;甘油对HLS/PVA复合膜起增塑作用,使复合膜的玻璃化转变温度、熔点、结晶度和拉伸强度降低,30%甘油增塑HLS/PVA复合膜具有较好的综合性能,热稳定性比PVA高10℃,拉伸强度和断裂伸长率分别为47.62 MPa和621.64%。In order to develop environment-friendly polymer materials,blend materials of polyvinyl alcohol( PVA)and lignosulfonate calcium( HLS) were prepared. The effects of HLS on the thermal and mechanical properties of PVA films and the plasticizing effect of glycerol on HLS / PVA blend films were studied. It has been found that strong interactions and good compatibility occur in HLS / PVA blends. HLS improves the strength and thermal stability of PVA and reduces the crystallinity. 25% HLS improves the tensile strength and thermal stability of PVA by 165% and 20 ℃,respectively; glycerol plays a typical plasticizer role in HLS / PVA blends suggested by the decreasing glass transition temperature,melting point,crystallinity,tensile strength and thermal stability; 30% glycerol plasticized blend shows good comprehensive properties. The thermal stability is 10 ℃ higher than that of pure PVA,and its tensile strength and elongation at break are 47. 62 MPa and 621. 64%,respectively.

关 键 词：聚乙烯醇 木质素磺酸钙 甘油 热稳定性 力学性能 

分 类 号：O631.11[理学—高分子化学]