【作者】 龚春丽； 文胜； 郑根稳；

【Author】 GONG Chun-li, WEN Sheng, ZHENG Gen-wen (Department of Chemistry, Xiaogan University, Xiaogan 432100,China)

【机构】 孝感学院化学系；

【摘要】 以氯磺酸为磺化剂制备了一系列不同磺化度的磺化聚醚酰亚胺(SPEI),并着重对其热降解和玻璃化转变行为进行了研究。采用TGA-FTIR对SPEI的热失重及失重产物分析表明SPEI有3个阶段的失重,分别归属于吸收的水分、磺酸基团及主链的降解,磺化之后热稳定性有所下降,磺酸基团在230-370℃区间发生降解,但主链的降解温度基本保持不变;SPEI的玻璃化转变温度(Tg)明显升高,当磺化度为62．6％时,体系出现了2个独立的 Tg。更多还原

【Abstract】 This paper modified polyether imide (PEI) by sulfonation with chlorosulfonic acid as sulfonation agent and studied the thermal degradation and glass transition behavior. The sulfonated samples were found to have a three-step thermal degradation behavior due to water removal, elimination of sulfonic acid groups and decomposition of the polymer matrix confirmed by TGA-FTIR. DSC revealed higher glass transition temperatures (Tg) with respect to the PEI and two Tg’s were detected when sulfonation degree equal to 62. 6% .更多还原