添加型聚丙烯大分子表面改性剂PP-g-PEG的制备及其应用  

SYNTHESIS AND CHARACTERIZATION OF A MACROMOLECULAR SURFACE MODIFIER FOR POLYPROPYLENE

作　　者：陈汉佳[1] 祝亚非[2] 张艺[1] 许家瑞[1] 

机构地区：[1]中山大学化学与化学工程学院聚合物复合材料与功能材料教育部重点实验室 [2]中山大学测试中心,广州510275

出　　处：《高分子学报》2007年第2期203-208,共6页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号50273048);教育部博士点专项科研基金(基金号20010558002);中山大学校长基金资助项目

摘　　要：以马来酸酐为桥联剂,通过其与单端羟基聚乙二醇的反应,合成了大分子表面改性剂聚丙烯-聚乙二醇接枝共聚物,探索了反应条件对接枝反应的影响,用IR、NMR、TGA、DSC对接枝物的结构及性能进行研究,并通过共混研究了接枝物对聚丙烯的表面改性效果.结果表明,提高马来酸酐接枝聚丙烯或聚乙二醇的分子量,会阻碍接枝反应的进行,接枝率明显下降;接枝聚乙二醇降低了接枝物的结晶能力;聚丙烯-聚乙二醇接枝共聚物的热稳定性随着聚乙二醇的含量增加及侧链聚乙二醇长度的增加略有下降;聚丙烯-聚乙二醇接枝共聚物组分在共混物中具有明显的向外择优迁移特性,可以作为聚丙烯的添加型表面改性剂使用.A novel macromolecular surface modifier,a polypropylene-grafted-poly（ethylene glycol） copolymer, was synthesized by coupling of polypropylene containing maleic anlrydride with monohydroxyl-terminated poly（ethylene glycol）. The effects of reaction conditions on the graft reactions were studied. The copolymers were characterized by IR, ^1H-NMR, TG and DSC. The results indicated that the graft reactions were hindered by increasing the molecular weight of PP or PEG. The graft copolymer had a lower crystallization capacity as compared with pure PP. The thermal stability of PP-g-PEG decreased with increasing the content of PEG or the molecular weight of PEG, The eopolymers were used to blend with polypropylene to modify the surface hydrophilicity of the products. The results of ATR-FTIR showed that PP-g-PEG could diffuse preferably onto the surface of the blends and be suitable as an effectual macromolecular surface modifier for PP.

关 键 词：表面改性 聚丙烯 接枝共聚物 全反射红外光谱 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]