一种氨基膦酸螯合树脂的合成及其表征

Preparation and Characterization of New-Type Amino-Phosphonic Acid Chelating Resins

以丙烯酰胺为单体,N,N′-亚甲基双丙烯酰胺为交联剂,通过自由基反应合成交联聚丙烯酰胺;然后通过M ann ich反应,对交联聚丙烯酰胺进行膦酸基功能化修饰,合成一种氨基膦酸螯合树脂(简称APAR)。通过对交联度、亚磷酸用量、反应温度和回流时间的探讨,确定了制备APAR的最佳工艺条件。通过傅里叶变换红外光谱仪(FTIR)和热重分析仪对树脂的结构和热性能进行表征。结果表明:该树脂具有较好的热稳定性。

A cross-linked polyacrylamide were synthesized by free radical polymerisation of acrylamide crosslinked with N, N＇ -methylenebisacrylamide. Aross-linked polyacrylamide resin was modified by Mannich reaction in phosphorous acid to give a amino-phosphonic acid chelating resin （ APAR）. The effect of degree of crosslinking and quantity of phosphorous acid and reaction temperature and time of backflow were investigated to gain optimum processing conditions. Chemical structure and thermal stability of resins were characterized by FTIR and TG. The results showed that the resin had good thermal Stability.