改性酚氧树脂/聚(甲基丙烯酸丁酯-co-4-乙烯基吡啶)共混物的相容-络合行为和表面表征  

Miscibility-complexation Behavior and Surface Characterization of Modified Phenoxy Resin/Poly(butyl methacrylate-co-4-vinyl pyridine) Blends

作　　者：刘世勇[1] 蔡倩[2] 朱蕙[2] 江明[2] 

机构地区：[1]中国科学技术大学高分子科学与工程系,合肥230026 [2]复旦大学高分子科学系,聚合物分子工程教育部重点实验室,上海200433

出　　处：《高等学校化学学报》2005年第6期1149-1155,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:50425310)资助.

摘　　要：合成了一系列不同4-乙烯基吡啶含量的聚(甲基丙烯酸丁酯-co-4-乙烯基吡啶)(BVPy)共聚物,并对酚氧树脂(Phenoxy)的仲羟基进行了不同乙酰化程度的改性.用粘度法和激光光散射(LLS)研究了BVPy/改性Phenoxy共混物在溶液中的络合行为对氢键相互作用基团密度的依赖性,并用DSC研究了共混体系在本体中的相容性.将粘度法及LLS的结果结合起来,得到了改性Phenoxy/BVPy共混体系的不相容-相容-络合转变相图.在此基础上,用XPS初步考察了共混物的相容性对其表面组成的影响.结果表明,大分子间的络合相互作用可抑制共混物的表面富集.A series of poly(butyl methacrylate-co-4-vinyl pyridine) copolymers with varying 4-vinyl pyridine(VPy) contents were synthesized. Phenoxy resin was modified to different extents by acetylation. Viscometry and laser light scatering(LLS) were then used to study the dependence of complexation behavior on the densities of specific interaction groups, while DSC was used to investigate the bulk miscibility of the polymer blends. Combined with viscometry, LLS and DSC data, an complete immiscibility-miscibility-complexation phase map was obtained. Finally, XPS was used to investigate the surface composition of the polymer blends or complexes with different strengths of specific interactions and probe the effect of bulk miscibility states on the surface properties. It was found that interpolymer complexation can greatly eliminate the surface enrichment in polymer blends with different surface free energy.

关 键 词：特殊相互作用 氢键 酚氧树酯 络合 表面表征 

分 类 号：O631[理学—高分子化学]