磺化聚酰胺的合成及性能

以对苯二酚及对氟苯甲腈为原料, 合成了芳香二羧酸单体1,4-二(4-羧基苯氧基)苯(BCPOB-COOH), 再经磺化反应合成了磺化芳香二羧酸单体1,4-二(4-羧基苯氧基)苯-2-磺酸钠(BCPOBS-Na). 另外, 以芳香二胺单体4,4'-二氨基二苯醚(ODA)为原料, 合成了磺化芳香二胺单体4,4'-二氨基二苯醚-2,2'-二磺酸(ODADS). 以N-甲基-2-吡咯烷酮(NMP)为溶剂、 亚磷酸三苯酯(TPP)与吡啶(Py)为缩合剂, 氯化钙或氯化锂或二者的组合为催化剂, 通过Yamazaki-Higashi直接缩聚, 使芳香二羧酸和芳香二胺中的磺化单体与非磺化单体反应, 制得了两种磺化芳香聚酰胺(Sulfonated polyamide, SPA). 通过红外光谱、 核磁共振波谱及热重分析等手段对聚合物的结构及性能进行了表征与分析, 并研究了聚合物的特性黏度、 溶解性、 成膜性及聚合物薄膜的力学性能等. 结果表明, 通过Yamazaki-Higashi直接缩聚制备的2种磺化芳香聚酰胺在极性非质子性溶剂中具有优良的溶解性能、 较高的耐热性能及优异的力学性能.

Synthesis and Characterization of Sulfonated Polyamides

Two kinds of sulfonated monomers were synthesized,i.e.,1,4-bis(4-carboxyphenoxy)benzene-2-sulfonate(BCPOBS-Na) and 4,4′-diaminodiphenyl ether-2,2′-disulfonic acid(ODADS).Then non-sulfonated monomer was reacted with sulfonated monemoer,respectively,via the Yamazaki-Higashi phosphorylation method in the presence of triphenylphosphite(TPP),pyridine(Py) and halide salts to give high molecular sulfonated aromatic polyamides(SPA-1 and SPA-2).The polymers were obtained in quantitative yields with inherent viscosities between 0.6 and 0.8 dL/g.The structures and properties of obtained solfonated polyamides were confirmed by FTIR,1H NMR and TGA.The results show good solubility in polar solvents,high thermal stability,good film forming ability and excellent mechanical properties.