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通过自由基引发的接枝共聚反应,使阴离子单体丙烯酸(AA)和阳离子单体二甲基二烯丙基氯化铵(DM DAAC)在羧甲基壳聚糖(CM CTS)的分子链上接枝共聚,制得CM CTS-g-(PAA-co-PDM DAAC)两性聚电解质高吸水性树脂。采用红外光谱对产物的结构进行了表征。比较了单体摩尔投料比和外部溶液的pH值对产物吸水性能的影响,并对不同pH值下外部溶液的离子强度对产物吸水性能的影响进行了研究。
The free-radically initiated graft copolymerization allowed the anionic monomer acrylic acid (AA) and the cationic monomer dimethyldiallylammonium chloride (DMDAAC) to react in the molecular chain of carboxymethyl chitosan (CM CTS) On the graft copolymer obtained CM CTS-g- (PAA-co-PDM DAAC) amphoteric polyelectrolyte superabsorbent resin. The structure of the product was characterized by infrared spectroscopy. The effects of monomer molar ratio and external solution pH on the water absorption of the product were compared. The effects of the ionic strength of the external solution on the water absorption of the product were also studied.