中文摘要：

以自制的侧基含溴的聚酰亚胺为大分子引发剂,2,2＇-联吡啶/氯化亚铜为催化体系,通过原子转移自由基聚合（ATRP）反应,引发甲基丙烯酸三氟乙酯（TFEMA）和甲基丙烯酸2-（三甲基硅氧基）乙酯（HEMA-tms）共聚,制备了以聚酰亚胺为主链的分子刷,聚酰亚胺-接枝-聚（甲基丙烯酸三氟乙酯-共-甲基丙烯酸2-（三甲基硅氧基）乙酯）,（PI-g-P（TFEMA-co-HEMA-tms））.对其中甲基丙烯酸2-（三甲基硅氧基）乙酯进行水解得到侧链含羟基的聚酰亚胺分子刷（PI-g-P（TFEMA-co-HEMA））,最后通过羟基与氯磷酸二乙酯反应,得到含亚磷酸酯基团的聚酰亚胺分子刷（PI-g-P（TFEMA-co-HEMA-P））.利用核磁共振氢谱（1H-NMR）、红外等方法,表征了所合成分子刷的结构.利用示差扫描量热法（DSC）、热失重分析（TGA）研究了聚合物分子刷的热性能.根据TGA计算出的分子刷组成与1H-NMR计算结果能较好的吻合.

英文摘要：

The macromolecular brushes,PI-g-P（TFEMA-co-HEMA-tms） was synthesized via atom transfer radical polymerization（ATRP）,using polyimide with bromide side-group（PI-Br） as the macroinitiator and 2,2′-bipyridine/CuCl as catalytic system,trifluoroethyl methacrylate（TFEMA） and 2-（trimethylsilyloxy）ethyl methacrylate（HEMA-tms） as the comonomers.PI-g-P（TFEMA-co-HEMA） with hydroxyl group in its side chains was generated by removing of trimethylsilyl groups under mild acidic condition.Finally,PI-g-P（TFEMA-co-HEMA-P） with phosphite groups（P） in its side chains was further synthesized by reaction between hydroxyl group of side chains,PHEMA and diethyl chlorophosphate.The structure of the resultant brushes was verified by1H-NMR,FTIR et al.Differential scanning calorimetry（DSC） and thermogravimetry analysis（TGA） were used to evaluate the thermal properties of the resultant macromolecular brush.The results show that PTFEMA chain segments decompose at around 120℃,and the PHEMA chains decompose at about 250℃,while the decomposition of PI backbone is over 425℃.The structure composition of the brush PI-g-P（TFEMA-co-HEMA） analyzed from TGA has a good agreement with the result calculated from 1H-NMR.The solubility tests indicate that the composition of the side chain has significant influence on the solubility of the brush.