PPQ-b-PS刚柔嵌段共聚物的合成及热稳定性

SYNTHESIS AND THERMOSTABILITIES OF ROD-COIL BLOCK COPOLYMERS OF POLY(PHENYLQUINOLINE-b-POLYSTYRENE

利用原子转移自由基聚舍方法舍成了端羧基聚苯乙烯，然后与4-氨基苯乙酮反应，生成末端为乙酰基的聚合物．以P2O5为催化剂，将功能化乙酰基的聚合物与5-乙酰基-2-氨基二苯甲酮共聚．合成出刚柔嵌段共聚物聚苯基喹啉-b-聚苯乙烯（PPQ-b-PS），用IR、^1H-NMR对其结构进行了表征，并对PPQ-b-PS嵌段共聚物的热稳定性进行研究．结果表明．PPQ-b-PS在空气中的失重有两个明显的过程．PPQ-b-PS在空气中的起始分解温度为275℃．但在275℃～400℃失重很少．在400℃时．其质量百分比为87．5％．在500℃～600℃迅速失重．到625℃时彻底分解．PPQ-b-PS在氩气中的起始分解温度为325℃．PPQ-b-PS的热稳定性高。

Polystyrene terminated with carboxyl group was synthesized by atom transfer radical polymerization（ATRP）, and the carboxylic acid terminated PS（PS-COOH） was functionalized by reacting with 4-aminoacetophenone and obtained the ketone methylene-terminated polystyrene. Rod-coil block copolymers of poly（phenylquinoline）-b-polystyrene（PPQ-b-PS） was synthesized by copolymerization of 5-acetyl-2-aminobenzophenone with the functionalized polystyrene by P2O5 catalyst. The structure of PPQ-b-PS diblock copolymers were characterized by IR, ^1H-NMR. And thermostabilities were studied. The results show that the first decompostion temperature of PPQ-b-PS is 275℃ in the air. The mass of PPQ-b-PEG reduces 12.5% at 275℃～400℃. It reduces rapidly at 400℃～600℃. The first decompostion temperature of PPQ-b-PS was 325℃ in Ar. The thermostability of PPQ-b-PS is high.