丙烯酸-丙烯酰胺合成树脂的制备及其性能研究

Study on preparation of acrylamide-acrylic acid resin and its performance

采用水溶液聚合的方法,以丙烯酰胺(AM)和丙烯酸(AA)为单体,以过硫酸钾(KPS)和亚硫酸氢钠为引发剂,N,N′-二甲基双丙烯酰胺(NMBA)为交联剂,来制备丙烯酸-丙烯酰胺合成吸水树脂。研究了其工艺过程并对其性能进行了测试。结果表明:在30℃下,丙烯酸-丙烯酰胺共聚树脂的最佳制备条件为:单体浓度为25%,n(AA)∶n(AM)=4∶1,中和度为75%,交联剂的用量和引发剂的用量分别为单体质量的0.04%和0.3%,所得到的树脂最佳吸纯水倍率及最佳吸0.9%(质量分数)NaCl溶液倍率分别为980g/g和95g/g。

The poly（acrylic acid-co-acrylamide）absorbent resin was prepared by water solution copolymerization using acrylic acid（AA）and acrylamide（AM）as monomers.Potassium persulfate（KPS）and sodium bisulfite as initiator and N,N-methylene double acrylamide（NMBA）as crosslinker.The technological process and the properties of water absorbency were studied.The results showed that the optimum reaction conditions were obtained as follows：monomer concentration was 25%,neutral degree was 75%,n（AA）∶n（AM）=4∶1,dosage of crosslinker was 0.04% and initiator was 0.3%at 30℃.The absorbency of resin to water and 0.9wt% NaCl solution was 980g/g and 95g/g,respectively.