聚芳醚砜醚酮共聚物的合成与表征

通过低温溶液亲电共缩聚合成了聚芳醚醚酮醚砜醚酮(Ia)、聚芳醚酮酮醚砜醚酮(Ib),甲基取代、双邻位甲基取代的聚芳醚酮酮醚酮醚砜醚酮(Ic、Id)等4种结构新型的共聚物。用傅里叶红外光谱仪(FT-IR)、核磁共振(1H-NMR)、差示扫描量热仪(DSC)、热重分析(TGA)、X射线衍射仪(WAXD)对聚合物进行了结构表征和性能测试。结果表明,共聚物有较高的玻璃化转变温度(Tg)177℃~188℃;较高的热分解温度(Td5%≥460℃),共聚物能溶解于N-甲基-2-吡咯烷酮,四氯乙烷和浓硫酸中;甲基取代的共聚物溶解性得到了明显改善,室温下还能溶于二氯甲烷、二氯乙烷、氯仿、N,N-二甲基甲酰胺、N,N-二甲基乙酰胺中。

Synthesis and Characterization of Poly(Aryl Ether Sulfone Ether Ketone) Copolymers

Poly(aryl ether sulfone ether ketone)s were synthesized by electrophilic polycondensation of 4,4′-sulfonylbis(1,4-phenylene)dioxy]dibenzoyl chloride with 1,4-diphenoyl benzene(DPB),4,4′-diphenoxytriphenyl diketone(DPOTPDK),4,4′di(2-methylphenoxytriphenyl diketone(o-Me-DPOTPDK),4,4′-di(2,6-bismethylphenoxytriphenyl diketone(o-Me2-DPOTPDK) respectively,in 1,2-dichloroethane(DCE),N,N-dimethyl acetamide(DMAc) with anhydrous aluminium trichloride(AlCl3) as catalyst.The structure and properties of copolymers were characterized by fourier transform infrared spectrophotometer(FT-IR),1H-nuclear magnetic resonance(1H-NMR),differential scanning calorimetry(DSC),thermal gravimetric analysis(TGA) and wide-angle X-ray diffraction(WAXD).The result of DSC shows that the glass transition of copolymers is at the range of 177 ℃～188 ℃.The onset temperature taken at 5% mass loss of the polymers in nitrogen is all above 460 ℃.The polymers are soluble in N-methyl-2-pyrrolidone(NMP),tetrechloroethane and concentrated sulfuric acid at room temperature.The methyl substituted copolymers have better solubility than the corresponding copolymers’,which can soluble in N,N-dimethyl formamide(DMF),DMAc,dichloromethane,1,2-dichloroethane and chloroform at room temperature.