摘要
以聚乙烯-乙烯醇(EVOH)为基体,通过化学修饰,在EVOH主链上引入磺酸基来控制产物的离子交换当量(IEC),利用缩醛反应进行交联改性来控制产物水溶性,进而合成出具有高IEC值和低水溶性的交联离子聚合物。反应后经滴定测定出产物的磺化度和IEC值,由红外光谱(FT-IR)表征产物的化学结构。结果表明,1260 cm-1附近磺酸的S=O伸缩振动吸收峰的存在说明了磺化产物的存在;热重分析(TGA)表明,经交联改性后的离子聚合物,其热分解温度由397℃上升到439℃,耐热性明显提高。
A new type cross - linked ionic polymer with high ion - exchange capacity and low water - soluble was synthesized by introducing sulfonic acid group to EVOH side chain and by aldolisation to modify the water - solubility. The sulfonation degree and ion - exchange capacity （ IEC value） were determined with titrimetry, and FT - IR was used to characterize the structure of cross - linked ionic polymer. FT - IR spectra showed that the sulfonic acid group was introduced onto EVOH side chain with the evidence of the peaks at 1260cm^-1 attributed to the S = 0 stretching vibration, and the thermo - gravimetric analysis showed that the thermolysis temperature of the cross - linked ionic polymer increased from 397 to 439℃.
出处
《化学与粘合》
CAS
2007年第3期161-163,共3页
Chemistry and Adhesion
基金
黑龙江省青年基金项目(编号:QC04C08)
黑龙江省教育厅科学技术研究资助项目(编号:10551078)
