聚丙烯酸钠/聚苯乙烯互穿聚合物网络的合成及性能研究

Synthesis and Properties of Poly(sodium acrylate)/Polystyrene Interpenetrating Polymer Networks

采用分步聚合法制备了交联聚丙烯酸甲酯/交联聚苯乙烯互穿聚合物网络,将其中的聚丙烯酸甲酯在碱性条件下水解,合成了一网亲水、另一网疏水的聚丙烯酸钠/聚苯乙烯互穿聚合物网络;测定了树脂中亲水基团和疏水基团摩尔比对树脂交换量和含水量的影响;比较了不同树脂在水中的溶胀性能及水溶液中苯甲酸、邻硝基苯酚、对硝基苯酚的吸附性能差别,推测吸附过程的主要作用为疏水作用;建立了一种通过溶胀致孔合成吸附树脂的方法.

Interpenetrating polymer networks of poly （methyl acrylate）/polystyrene were prepared by using the sequential polymerization method. The hydrophilic- hydrophobic IPNs composed of poly（ sodium acrylate） and polystyrene were synthesized through hydrolysis of the poly（methyl acrylate） network under basic environment. Influence of the molar ratio of hydrophilic and hydrophobic groups on the exchange capacity and water retention of the hydrophilic-hydrophobic IPNs were investigated. Swelling property in water and adsorption property for benzoic acid, o-nitrophenol, and p-nitrophenol in aqueous solution of the hydrophilic-hydrophobic IPN were compared. The results of adsorptive experiments demonstrared that PNaA/PS IPN could adsorb organic compounds such as benzoic acid, o-nitrophenol, and p-nitrophenol from aqueous solution, and this implied that resinic adsorbents can be prepared by porogening via swelling of gel-type IPNs. Adsorption properties of one of the PNaA/PS IPNs for various adsorbates were investigated, and the results suggested that adsorption of the above compounds might be mainly based on hydrophobic interaction.