含氟共聚芳醚酮的合成与性能研究

SYNTHESIS AND PROPERTIES OF COPOLY(ARYL ETHER KETONE) CONTAINING A 4-FLUOROPHENYL GROUP

通过三步反应合成新的含氟双酚单体4-氟苯基对苯二酚，在该含氟双酚单体中加入不同比例的间苯二酚与4，4＇-二氟二苯酮经亲核缩聚反应制备了一系列新型共聚芳醚酮。用傅立叶变换红外光谱仪、差示扫描量热仪、热失重分析仪及广角X射线衍射仪等对聚合物的结构和性能进行了表征和研究。结果表明，该共聚物为非晶态，具有优异的耐热性能，其玻璃化转变温度（t）在123～159％、氮气中5％热失重温度在510％以上；且具有良好的溶解性，室温下能溶解于，N-甲基吡咯烷酮、N，N-二甲基乙酰胺、氯仿等有机溶剂。

New bisphenol monomer, （4-fluoro）phenylhydroquinone was synthesized in a three-step synthesis. A series of copolymers were prepared from the bisphenol monomer together with resorcinol and 4,4＇-diflourodiphenylketone via a nucelophilic aromatic substitution polycondensation. The structures of the monomer and copolymers were confirmed by 1 H-NMR and FTIR, and the properties of these copolymers were also studied by DSC, TGA, WXRD, etc. It was found these copolymers showed high temperature stability, i. e the 5 % weight loss temperatures in nitrogen gas was above 510℃, and their glass transition temperatures （ Tg ） ranged from 123℃ to 159℃. These copoly/ners had good solubility in some polar aprotic solvents such as NMP, DMAc, CHC13, etc.