一种亚胺羧酸型螯合树脂的合成

Synthesis of imine carboxylic acid chelating resin

采用悬浮聚合法,以甲苯为油相,聚乙二醇为乳化剂,氯化钠分散油相,以1,2-二乙烯基苯(o-DVB)和亚氨基二乙酸二乙酯为原料合成了亚胺羧酸型螯合树脂。分析了产物的官能团和外观形态,研究了溴化时间、引发剂、原料配比对溴化聚苯乙烯产率的影响。结果表明:溴化聚苯乙烯产率随溴化时间的延长先增大后降低,最佳溴化时间为45 min;溴化聚苯乙烯产率随引发剂用量的增加先快速增加再下降,但降幅变化不大,当引发剂用量为0.18 g时,达最大值72%;在聚合中,随着o-DVB与溴化二乙烯基苯摩尔比的增加,产物产率增加,但官能团密度降低;引发剂用量越多,溴化聚苯乙烯粒径越小,且具有较高的成球率。

An imine carboxylic acid chelating resin was synthesized via suspension polymerizationwith1,2-divinyl benzene(o-DVB)and iminodiacetic acid diethyl ester as feedstock,polyethylene glycol asemulsifier,NaCl water solution as dispersed phase,and toluene as oil phase solvent.The functional group andmorphology of the product were characterized,and the impact of bromide time,initiator,mole ratio of feedstockon yield of brominated polystyrene were observed as well.The results show that the yield of brominated polystyreneincreases and then decreases with the increasing of bromide time,and the optimal bromide time is45min;it also surges then drops slightly with the initiator increasing and reaches the peak of72%when the initiatoris0.18g;the yield of the product follows the increasing of the mole ratio of o-DVB and brominated DVB,while the destiny of functional group is decreased.There the more the initiator are,the smaller the particle ofbrominated polystyrene becomes,and the greater granulation rate achieves.