含环氧侧基酚酞聚芳醚酮的合成及其自固化

摘要

由3,3’-双(4-羟基苯基)苯并吡咯酮(H PP)和4,4’-二氟二苯酮经亲核缩聚合成聚芳醚酮(PEK-H),再经与环氧氯丙烷(ECH)的亲核取代反应,制得了一种含量可控的环氧侧基酚酞聚芳醚酮(PEK-HE).改变ECH的投料量,可调控环氧侧基在聚合物中的含量.采用FHR、1H NMR和TGA等技术对聚合物进行了结构表征与性能测试,并考察了经自固化后聚合物涂膜的性能.涂膜热稳定性较固化前明显提高,5％热失重温度均在450℃以上.涂膜具有优异的热性能和机械性能:耐温(350±20)℃；冲击强度高于100 kg·cm.%A novel cardo poly(aryl ether ketone) bearing pendant epoxy group with controlled content(PEKHE) was prepared,by nucleophilic polycondensation from 3,3-bis (4-hydroxyphenyl) benzo pyrrolone (HPP)with 4,4'-diflorobenzophenone,followed by a substitution reaction with epichlorohydrin(ECH).The content of epoxy side group could be controlled via altering the amount of reactant monomer.Structure and properties were characterized and tested by FHR,1H NMR,TGA,etc.Properties of the PEK-HE coating were investigated after self-curing.Thermal stability of the coating layer was obviously improved compared to that before curing,and 5％ mass loss temperature was all over 450 ℃.The layers had excellent thermal and mechanical properties:heat-resistant temperatures were (350 ± 20) ℃,the impact strength were all above 100 kg·cm.Thus the PEK-HE was expected for the application of high performance self-curing coating.