高性能聚芳醚酮的合成与性能(Ⅰ)——对苯二酚、联苯二酚、4,4′,-二氟二苯酮三元共聚体系

Syntheses and Properties of High Performance Poly(Aryl Ether Ether Ketone) Copolymers——Copolycondensatlon of Hydroquinone, 4,4'-DiphenoI and 4,4'-Difluorobenzophenone

聚醚醚酮(PEEK)具有突出的耐高温水解和耐辐照性能以及良好的断裂韧性,现已在核能、宇航等高技术领域得到应用。研制新型聚芳醚酮是目前十分活跃的课题。本文采用亲核取代路线,以对苯二酚、联苯二酚、4,4′-二氟二苯酮为单体合成了一系列含亚联苯结构的新型聚芳醚酮,并对基基本性能进行了测定。

Poly (ether ether ketone) (PEEK), a high-temperature resistant thermoplastic resin, has been used in a lot of fields because of its excellent properites. With the development of high technology, the resins having higher service temperature are required. A series of terpolymers(DPEEKs) have been prepared by copolycondensation of hydroquinone, 4,4'-diphenol and 4,4'~difluorobenzophenone with alkali metal carbonate at 320~350℃ using diphenylsulphone as solvent for the reaction. The Ts of a DPEEK by the nucleophilic substitution route is higher than that of a PEEK. The relationships between Ts, Tm and the molar ratio of 4,4'-diphenol are studied by a differential scanning calorimeter. The DPEEKs possess higher service temperatures than PEEK, and their mechanical properties are as good as those of PEEK.