丙烯酸与丙烯酰胺共聚制备高吸水性树脂

Preparation of a Water Superabsorbent by Copolymerization of Acrylic Acid with Acrylamide

采用溶液聚合法,以N,N′-亚甲基双丙烯酰胺(NMBA)为交联剂,过硫酸钾(KPS)为引发剂合成了高吸水性树脂聚(丙烯酸-丙烯酰胺)(P(AA-AM)),研究了单体配比、丙烯酸中和度、引发剂及交联剂用量、反应温度对树脂在去离子水和0.9%盐水中吸水率的影响.最佳条件下制备的树脂在去离子水中吸水率为750g.g-1,在0.9%盐水中吸水率为85g.g-1.

A water superabsorbent, copolymer of acrylic acid and acrylamide （P （AA-AM）） was prepared by means of water solution copolymerization with potassium persulfate as initiator, N, N＇-methylene-bis-acrylamide as crosslinking agent. The influence of mole ratio of acrylamide （AM） to acrylic acid （AA） , degree of neutralization of AA, the amount of crosslinking agent and initiator, and reaction temperature on water absorbence（Q） was investigated. The absorbency for water of the superabsorbent prepared at the best condition was about 750 g·g^-1 in distilled water and 85 g·g^-1 in 0.9 % NaCl solution, respectively.