中文摘要：

用铬酸氧化法在聚乙烯薄膜的表面引入了羧基阴离子，合成了端基阳离子性的聚乙二醇重氮树脂，用静电自组装并辅以紫外光照射的方法，在聚乙烯薄膜的表面引入了共价键连接的聚乙二醇分子链．用紫外-可见分光光度法研究了重氮树脂及其静电自组装体系的光分解性质，得到重氮基团的分解速率常数kd=0．0214s^-1．红外分析表明，紫外光照射后聚乙烯薄膜表面连接的聚乙二醇分子链可耐DMF-ZnCl2-H2O三元极性溶剂的刻蚀．由于在聚乙烯薄膜的表面引入了亲水性的聚乙二醇分子链，其表面接触角从改性前的104°降至48°．

英文摘要：

Hydrophilic PEG chains were introduced on HDPE film surfaces by the electrostatic self-assembly method via the electrostatic adsorption of PEG （ polyethylene glycol） diazo-resin polycations on HDPE film surfaces which were pretreated by the concentrated chromic acid solution to produce carboxyl anions. Then the self-assembly monolayers were stabilized by covalence bonds formed from the decomposition of diazonium groups under ultraviolet irradiation. The photochemical decomposition of the diazonium groups was evaluated by the UV-visible spectroscopy method with a kd value of 0. 021 4 s^-1. The improved stability of the self-assembly monolayers with UV irradiation was identified by a solvent etching experiment of DMF-ZnCl2-H2O. The hydrophobic surfaces of HDPE films are hence hydrophilically modified with the contact angle decreasing from 104° to 48° .