摘要
不同联苯含量的ＰＥＥＫＫ－ＰＥＢＥＫＫ共聚物的ＤＳＣ结果表明，随着联苯含量的增加，共聚物的玻璃化转变温度几逐渐升高；共聚物的熔点Ｔｍ明显地依赖于联苯含量，当联苯含量ｎＢ＝０．３５时，Ｔｍ值最４小。热处理可以显著地改善共聚物的结晶性，并出现熔融重结晶双峰。
Transformational behaviour of Tg and Tm for PEEKK-PEBEKK copolymers with various biphenyl content was studied by using DSC. Results revealed that the glass transition temperature Tg for the copolymers gradually increased with increasing biphenyl content nB. The melting points Tm of the copolymers obviously depended on nB. Tm value was minimum when nB=0. 35. Heat behaviour of the copolymers could be markedly changed by heat treatment. Behaviour of double melting peak for the copolymer resulted from the crystal melting and the recrystallization was also studied.
出处
《应用化学》
CAS
CSCD
北大核心
1996年第2期57-60,共4页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金
关键词
PEEKK
PEBEKK
共聚物
玻璃化转变温度
熔点
poly (ether ether Ketone ketone)-poly (ether biphenyl ether ketone ketone) copolymer, transformation of T_g and T_m, DSC, heat treatment
