摘要
以二甲基二苄基硅烷(DMDPMS)作为第3种单体,与4,4′-二苯氧基苯(PPOP)和间苯二甲酰氯(IPC)共缩聚,以1,2-二氯乙烷(DCE)为溶剂、AlCl3为催化剂、N,N-二甲基甲酰胺(DMF)为助剂,合成了系列新线型高分子量的主链含硅杂原子结构的聚芳硅酮酮(PSiKK)/聚醚醚酮酮(PEEKK)无规共聚物,并用IR、DSC、WAXD、TGA等技术对共聚物进行了表征与分析,考察了共聚物的热性能、溶解性能和结晶性能.结果表明,随着DPMDPS含量的增加,聚合物的玻璃化转变温度(Tg)、熔融温度(Tm)和热分解温度(Td)总体上呈下降趋势,溶解性能逐步得到改善.当共聚物中DMDPMS的含量小于10%时,该系列聚合物Td可达501℃以上,Tg达148℃.有趣的是,少量DMDPMS的引入,不但没有降低PEEKK的结晶性,反而能促使其结晶,但硅结构单元含量增加到一定程度后,结晶度逐渐下降;当硅基含量达到50%时,聚合物接近非晶态.
A novel series of random copolymers poly（aryl ether ether ketone ketone）, containing silicon on the backbone, were prepared by low temperature solution polycondensation of 4,4＇ -diphenoxydiphene （DPOP）, ehiphenylmethylie and isophthalyl chloride（lPC） in 1,2 - dichloroethane with the presence of AlCl3 and DMF. The copolymer were characterized by FT- IR, DSC, X RD, rIGA, etc., and studied on their solubility, heat- resisting ability, and crystal ability. The results show that the glass transition temperatures, melting- point and decomposing- temperature were, on the whole, decreased, with the increasing ratio of DMDPMS/DPOP, while their solubility increase. The thermal decompose temperature and glass transition temperature of the random copolymers reached such high as 501℃, 148℃ respectively, when the ratio of DMDPMS/DPOP within 10 percent. An interesting phenomenon was found that the crystal ability of the random copolymers increased, in a small rang, with the increasing ratio of DMDPMS/DPOP, while decreased in a large amount of containing of DMDPMS in the backbone.
出处
《江西师范大学学报（自然科学版）》
CAS
北大核心
2005年第6期505-508,共4页
Journal of Jiangxi Normal University(Natural Science Edition)
基金
国家"863"计划(2002AA333120)
国家自然科学基金(20264001)资助项目
关键词
聚芳硅酮酮
硅杂原子
共聚
结构与性能
poly（aryl silicon ketone ketone）
silicxm
eopolymer
properties and structure
