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

作　　者：龙永福[1] 谢凯[1] 许静[1] 张学骜[1] 肖加余[1] 

机构地区：[1]国防科技大学材料工程与应用化学系,湖南长沙410073

出　　处：《高分子材料科学与工程》2006年第3期66-69,共4页Polymer Materials Science & Engineering

基　　金：国家973资助项目(5130702002)

摘　　要：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.

关 键 词：聚苯基喹林 聚苯乙烯 刚柔嵌段共聚物 合成 热稳定性 

分 类 号：TQ316.61[化学工程—高聚物工业]