等离子体引发非离子型高吸水性树脂的合成及性能

将水溶性单体甲基丙烯酸二甲氨基乙酯（ＤＭ） 及丙烯酰胺（ＡＡＭ） 用低温等离子体引发水溶液共聚合，制得吸去离子水倍率达１０００ 倍，吸盐水率（ ｗ（ＮａＣｌ） ＝０－９％） 达１５０ 倍的非离子型高吸水性树脂。研究了多种因素对树脂吸液率的影响，实验结果表明：单体配比ｍ （ＡＡＭ）∶ｍ（ＤＭ）＝１∶５ ，等离子体放电功率以１５０Ｗ 为好；在实验范围内树脂吸液率随放电时间（１０～９０ｓ）及后聚合时间（６～１８ｄ） 的延长而增大。另外，采用本方法制取高吸水性树脂的单体总转化率在６８％ 以上，同时树脂的吸液能力明显比热聚合法制得的要高。

Synthesis and Property of Non ionic Super Water absorbing Resin by Plasma Initiated Polymerization

A super water absorbing resin was obtained from N,N dimethylaminoethylmethacrylate and acrylamide by plasma initiated polymerization at low temperature in an aqueous solution.The resin had absorbencies of 1000g/g for deionized water and 150g/g for NaCl solution(w(NaCl)=0.9%).Many factors affecting the absorbing properties were studied.The experimental results were as follows:the best monomer composition (m(AAM)∶m(DM)) was 1∶5 while the plasma discharge power was 150W;the absorbency of resin increased as the plasma duration time(10～90s) and the post polymerization time(6～18d) increased.The conversion of monomers used in this process was more than 68%,and the absorbency of the resulting resin was much more higher than that of the resin by thermal polymerization.