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在没有氮气保护的作用下,以N,N′-亚甲基双丙烯酰胺(NMBA)为交联剂,以过硫酸铵(APS)为引发剂,采用静置热聚合法合成2-丙烯酰胺基-2-甲基丙磺酸(AMPS)/丙烯酰胺(AM)/羧甲基纤维素钠(CMC)三元共聚高吸水树脂。研究了反应条件对树脂吸水率的影响,并借助FT-IR、TG-DTA和偏光对树脂的分子结构、热稳定性和表面形态进行了分析。实验结果表明:所得树脂的最佳反应条件为:n(AM)∶n(AMPS)=1∶1、ω(APS)=0.45%、ω(CMC)=9%、ω(NMBA)=0.085%和pH=1.2,在此条件下合成的高吸水树脂室温下最大吸蒸馏水倍率为909g/g。
In the absence of nitrogen protection, N, N’-methylenebisacrylamide (NMBA) as crosslinking agent, ammonium persulfate (APS) as initiator, the use of static heat polymerization synthesis of 2-acrylamide 2-methylpropanesulfonic acid (AMPS) / acrylamide (AM) / sodium carboxymethyl cellulose (CMC) terpolymer superabsorbent. The influence of reaction conditions on the water absorption of the resin was investigated. The molecular structure, thermal stability and surface morphology of the resin were analyzed by FT-IR, TG-DTA and polarized light. The experimental results show that the optimal reaction conditions of the obtained resin are as follows: n (AM): n (AMPS) = 1: 1, ω (APS) = 0.45%, ω (CMC) = 9%, ω (NMBA) = 0.085% And pH = 1.2, under the conditions of superabsorbent synthesized at room temperature maximum suction distilled water ratio of 909g / g.