摘要
通过联苯二酚（介晶基元）、取代对苯二酚（破坏结晶基元）与４，４′－二氟二苯酮的亲核取代反应合成了一系列具有液晶性的新型聚芳醚酮．采用ＤＳＣ、ＰＬＭ和ＷＡＸＤ等方法对聚合物的研究表明：联苯含量为７０％时聚合物表现为向列相，联苯含量为５０％时聚合物出现近晶相．在外力场作用下。
The novel poly(aryl ether ketone)s with liquid crystallinity were synthesized by nucleophilic substitution reactions of 4,4′ biphenol and substituted hydroquinone with 4,4′ difluorobenzophenone and their thermotropic liquid crystalline properties were characterized by DSC, PLM and WAXD. The copolymers containing 70% biphenol formed nematic phase while the copolymer containing 50% biphenol exhibited smectic texture. The banded textures were formed after shearing the sample in the nematic liquid crystalline state. The identification of the structures in each mesogenic phase has been carried out by combining WAXD with PLM and DSC.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第6期984-988,共5页
Chemical Journal of Chinese Universities
基金
国家"863"重大项目
中国科学院高分子物理开放实验室基金
关键词
聚芳醚酮
液晶聚合物
合成
表征
Poly(aryl ether ketone), Liquid crystalline polymer, Liquid crystalline behavior
