四元共聚高吸水性树脂的制备及性能研究

采用反相悬浮聚合法,以过硫酸钾为引发剂,N,N-亚甲基双丙烯酰胺为交联剂,合成了丙烯酸钠/丙烯酰胺/2-丙烯酰胺基-2-甲基丙磺酸钠/二烯丙基二甲基氯化铵四元共聚高吸水性树脂。探讨了单体组成配比、反应温度、交联剂用量、引发剂用量等共聚反应条件对吸水性能的影响。结果表明在聚丙烯酸系高吸水性树脂的分子链上同时引入适当配比的亲水阳离子基团(季铵阳离子)、磺酸基、酰胺基和羟基能产生良好的协同效应,有效提高了树脂的耐盐性能及吸水性能。所得产品的吸蒸馏水率和吸盐水率分别为810g/g和160g/g,热稳定性好。IR初步表明几种共聚物单体产生了交联,官能团之间产生了较好的协同效应。

Study on the Preparation and Performance of Multigroup-cooperated Superabsorbent Polymer

A kind of salt-resisting multi-copolymerized superabsorbent polymer was synthesized by inverse suspension polymerization of acrylic acid(AA) , acrylamide( AM), soldium 2-acrrlamido-2-methyl-propanesulfonate(NaAMPS) and DADMAC using N, N-methylene-bis-acrylamide as crosslinking agent, and sodium sulfite as initiator, and cyclohexane as continuous phase. The influence of the composition and proportion of the monomer, reaction temperature, amounts of crosslinking agent, initiator on the capability of the copolymer is discussed . The result shows introducing hydrophilic cation (quaternary ammonium - group) , hy-drophilic anion(sulfo-group )and acrylamido - group into acryliccopolymer in term of proper proportion simultaneously can make them cooperate perfectly and greatly improve the salt - resisting performance of the copolymer. The absorption rates of the copolymer is 810(g/g) for distilled water and 160(g/g) for 0.9 % NaCl solution. IR shows these monomers have linked each other and the function groups have cooperated effectively.