中文摘要：

以1,4-二（4-苯氧基苯甲酰基）苯（p-EKKE）、1,3-二（4-苯氧基苯甲酰基）苯（m-EKKE）、二苯醚（DPE）分别与对苯二甲酰氯（TPC）、间苯二甲酰氯（IPC）亲电共缩聚,合成全对位、全间位、对间位取代及交替聚芳醚酮酮（p-PEKK、i-PEKK、p/i-PEKK、a-PEKK）,用FT-IR、DSC、WAXD、TG、SEM等技术对p-EKKE和m-EKKE以及PEKKs的结构与性能进行了分析表征.结果表明,随着1,3-苯基含量的增加,共聚物的熔融温度（Tm）和玻璃化转变温度逐渐降低,而热分解温度变化不大;p/i-PEKK交替共聚物较之于无规共聚物,有较好的链规整性和较高的结晶度;WAXD分析表明,共聚物p-PEKK的结晶衍射峰和小分子模型化合物p-EKKE基本相同,同属正交晶系,全间位取代的i-PEKK在熔融冷却过程中很难再次结晶,转变为非晶聚集态,其2θ角和m-EKKE针状结晶基本相同,属三斜晶系.

英文摘要：

A series of high molecular weight alteruative and random poly（aryl ether ketone ketone） copolymers were prepared by low-temperature solution poly-condensation, with 1,4-bis （4-phenoxybenzoyl） benzene （p-EKKE）, 1,3- bis （ 4-phenoxybenzoyl ） benzene （ m-EKKE ）, diphenyl ether （ DPE ） and terephthaloyl chloride （ TPC ） or isophthaloyl chloride （IPC）, respectively. The inherent viscosities （ ηinh ） of resulting copolymers were in the range of 0.63 A- 1.08 dL/g. The chemical structure of p-EKKE, m-EKKE and PEKKs were confirmed by FT-IR. The thermal properties of copolymers were obtained by DSC and TG. The DSC results indicated that the melt temperature （ Tm ） and the glass transition temperature （ Tg ） decreased with increasing the amount of meta-phenylene substituted in the main chain. The TG results showed that the copolymers had excellent thermo-oxidative stability, being stable above 530℃, which was affected slightly by the amount of meta-phenylene substituted in the main chain. The alternative eopolymer b-PEKK has better order and higher erystallinity than random copolymers. WAXD showed that copolymer p-PEKK and its model compound had the same crystallization diffraction spectra corresponding to a rhombic system. While the morphology of the copolymer i-PEKK and the corresponding model compound showed needle crystals, which belonged to an anorthic system, i-PEKK was difficult to crystallize again in the course of melting, and it was in an amorphous state.