摘要
以二乙烯基苯为交联剂甲苯为致孔剂 ,通过悬浮聚合方法合成大孔交联聚丙烯腈树脂 ,用 80 %的硫酸溶液和 2 0 %的氢氧化钠溶液依次对树脂进行酸水解和碱水解。红外光谱结果表明 ,树脂在酸水解时孔隙表面产生酰胺基团 ,在碱水解时孔隙表面基团进一步被水解成羧酸根 ,水解完成后树脂骨架为聚丙烯腈 ,孔隙表面层为聚丙烯酰胺和聚丙烯酸钠。用扫描电镜分析树脂的微观结构 ,讨论了交联剂和致孔剂用量对树脂性能的影响 。
Macroporous crosslinked polyacrylonitrile resin was synthesized via suspension polymerization, using divinylbenzene as crosslinker and toluene as porogen. The resin was hydrolyzed by 80% H 2SO 4 solution and 20% NaOH solution in turn. The FT IR results indicated there were amide groups produced on the surface of the porous resin when by acid hydrolysis, and carboxylic groups when by alkali hydrolysis. After the whole hydrolysis course , it was polyacrylamide(PAM) and poly sodium acrylate(PNaA) on the skin of the resin , while still polyacrylonitrile inside. The micro structure was analysed by SEM. The effect of concentration of the crosslinker and the porogen on properties of the resin was discussed, and the influence of alkali hydrolysis time on the amount of carboxylic groups was measured by acid-base titration.
出处
《化工新型材料》
CAS
CSCD
2004年第7期39-42,共4页
New Chemical Materials
