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采用浓硫酸和聚醚醚酮(PEEK)制备了不同磺化度(DS)的磺化聚醚醚酮(SPEEK)。通过1 H-核磁(1 HNMR)对SPEEK化学结构进行表征。同时,根据1 H-NMR积分面积计算并确定了70℃条件下,磺化时间分别为2、4、6、8和10h制备的SPEEK磺化度分别为25.6%、48.7%、71.6%、85.4%和91.0%。采用扫描电镜(SEM)、差式扫描量热仪(DSC)以及热重分析(TGA)对比分析了磺化度对SPEEK微观结构、玻璃化转变温度(Tg)和热稳定性能的影响。研究结果表明,磺化度为71.6%的SPEEK具有均匀的微观结构和最优异的热稳定性能。
Sulfonated polyetheretherketone (SPEEK) with different degree of sulfonation (DS) was prepared with concentrated sulfuric acid and polyetheretherketone (PEEK). The SPEEK chemical structure was characterized by 1 H-NMR (1 H NMR). At the same time, the sulfonation degrees of SPEEK prepared by sulfonation time at 2, 4, 6, 8 and 10 h were calculated as 25.6%, 48.7%, 71.6% and 85.4 % And 91.0%. The effects of sulfonation degree on the microstructure, glass transition temperature (Tg) and thermal stability of SPEEK were analyzed by scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The results show that the SPEEK with a degree of sulfonation of 71.6% has uniform microstructure and the best thermal stability.