摘要
为了获得一种综合性能好的聚芳醚酮酮体系，从亲电、亲核及其共聚反应合成了ＰＥＫＫ及其共聚体系，其均聚物性能为Ｔｍ＝３７８～４００℃；Ｔｇ＝１６５～１７４℃；Ｔｄ＝５１０～５３５℃（２．５％质量损失），这些明显地高于ＰＥＥＫ。在ＰＥＫＫ共聚体系中，首次找到了最低熔点附近的体系，其综合性能与ＰＥＥＫ相当，且利于加工。反应研究认为，亲核亲电反应中均有支链产物，是造成目前ＰＥＫＫ树脂多分散性和熔点不确定的重要原因之一。
To further enhance the practical properties of poly(aryl ether ketone ketone)s (PEKK), this paper had studied the synthesis of PEKK homopolymers and copolymers by both electrophilic and nucleophilic substitution methods. Results showed that PEKK homopolymers had glassy transition of 165～172 ℃( T g) and melting point of 378～400 ℃( T m). Comparison of properties between PEKK samples showed that PEKK synthesized by nucleophilic polycondensation method is superior to that synthesized by electrophilic polycondensation method. By using co polycondensation of 4,4′ Di(para hydro benzoyl) benzene and hydroquinone with 4,4′ Di(para florine benzoyl) benzene, more practical copolymer samples are found, which have melting point next to the lowest melting point but still kept its high tensile strength. This modification made PEKK practical in use.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1997年第3期20-26,共7页
Polymer Materials Science & Engineering
关键词
亲核反应
共聚
最低共熔点
聚芳醚酮酮
electrophilic and nucleophilic reaction, copolymerization, lowest melting point
