【摘要】 以不同物质的量比的2,6-二氯苯甲腈(DCBN)、4,4’-二氟二苯甲酮(DFBP)和双酚A(BP-A)为原料,在常压下通过溶液聚合反应合成了一系列无定形的双酚A型聚芳醚酮腈共聚物(PEKN)。通过红外光谱(FTIR)、差示扫描量热(DSC)、热失重分析(TGA)等对PEKN共聚物的结构和性能进行了表征。结果表明,此类聚合物具有较高的热稳定性,随着聚合物的组成不同,玻璃化转变温度Tg在154～170℃变化,氮气保护下5%的热失重温度在482～523℃变化。聚合物的力学性能受结构变化影响较大,其拉伸强度介于76～100 MPa。另外,聚合物具有良好的溶解性能,室温下可溶于三氯甲烷、N-甲基吡咯烷酮、四氢呋喃、N,N-二甲基乙酰胺等有机溶剂中。更多还原

【Abstract】 A series of amorphous poly(arylene ether ketone nitrile)s(PEKN)containing bisphenol A were synthesized by solution polymerization from bisphenol A(BP-A),2,6-dichlorobenzonitrile(DCBN)and 4,4′-difluorodiphenylketone(DFBP)under normal atmosphere.The structure and properties of the PEKN copolymer were characterized by FTIR,DSC,TGA and other means.The results showed that the copolymers had high thermal stability.The glass transition temperatures(Tg)were in the range of 154~170 ℃,the 5%weight loss temperatures were in the range of 482~523 ℃ in nitrogen atmosphere.The mechanical properties of the copolymers were influenced by the change of the structure and the tensile strength were in the range of 76~100 MPa.The copolymers of PEKN showed good solubility in some organic solvents,such as trichloromethane,N-methylpyrrolidone,tetrahydrofuran,N,N-dimethyl acetamide.更多还原