中文摘要：

以含均三嗪环结构的双氟单体2,4-二（4-氟苯基）-6-苯基-1,3,5-三嗪（BFPT）与4,4＇-联苯二酚（BP）和9,9-二（4-羟基苯基）芴（BHF）为共聚单体,经溶液亲核取代逐步聚合,合成了一系列主链含三芳基均三嗪环结构和双苯基芴结构线性聚芳醚（PEPs）.反应过程经优化,得到的聚合物数均分子量高达6.3×104.采用元素分析、FTIR、NMR和H-H gCOSY等对聚合物结构进行表征,并对聚合物进行溶解性、示差扫描量热（DSC）、动态力学性能（DMA）、热失重（TGA）、机械性能等测试.由于双苯基芴基团的存在,聚合物的溶解性得到明显改善.当双苯基芴结构单元含量高于20%时,聚合物可溶于N-甲基吡咯烷酮（NMP）、氯仿（CHCl3）、四氯乙烷（C2H2Cl4）、和吡啶（pyridine）等极性溶剂中,同时保持了优异的耐热性.聚合物的玻璃化转变温度Tg由DSC测得在269~307℃之间,由DMA测得在269~291℃之间,且随着主链中双苯基芴结构的增加而升高.N2气氛下,PEPs的5%热失重温度超过544℃,800℃残碳率大于48%.

英文摘要：

A series of novel aromatic poly（arylene ether）s containing diphenylfluorene and phenyl-s-triazine groups in the main chain were prepared by a solution nucleophilic polycondensation of 2, 4-bis （4- fluorophenyl）-6-phenyl-1,3,5-s-triazine （BFPT） with Biphenol （BP） and 9,9＇-bis （ 4-hydroxyphenyl ） fluorine （BHF） to investigate the effects of bulky diphenylfluorene units on solubility as well as thermal and mechanical properties. The synthetic procedure was efficiently optimized,resulting in high Mo up to 6. 3×10^4 （GPC）. The structure of the resulting polymers were characterized by elemental analysis, FTIR, NMR, and their thermal properties were evaluated by DSC, DMA, TGA measurements in succession. The solubility of polymers obtained was modified by the presence of diphenylfluorene groups in the polymer main chain resulting in being readily dissolved in common organic solvents, such as N-methylpyrrolidone （NMP） ,chloroform, 1,1, 1,2,-tetrachlorethane and pyridine, when the contents of diphenylfluorene structural units surpassed 20%. Moreover, PEPs had excellent thermal properties with glass transition temperarures （Tgs） in the range of 269 307℃ measured by DSC, and 269 -291℃ detected by DMA,5% mass-loss temperatures lying between 544℃ and 580℃, char yields at 800℃ higher than 48% under N2 atmosphere. The solubility and Tg s increase with the increase of diphenylfluorene contents in the polymer backbone. This kind of phenyl-s-triazine- based poly（arylene ether）s may be considered as a good candidate of high-performance structural materials.