二乙烯苯交联聚(2-羟乙基硫甲基苯乙烯)树脂的相转移催化合成

Synthesis of Divinylbenzene Crosslinked Poly(2-hydroxyethyl- mercaptomethylstyrene) by Phase Transfer Catalysis

研究了固 液 液体系中相转移催化的交联氯甲基化聚苯乙烯与 2 巯基乙醇的反应 ,合成了一种含有硫和氧的新型螯合树脂二乙烯苯交联聚 (2 羟乙基硫甲基苯乙烯 ) (PSME) .用FT IR监测手段 ,研究了反应时间、反应温度、相转移催化剂、溶剂极性以及反应物摩尔比对转化率的影响 .结果表明 ,当温度为 2 98K ,2 巯基乙醇与氯甲基化聚苯乙烯的摩尔比为 6 ,十四烷基三甲基溴化铵为相转移催化剂时 ,在苯 /NaOH水溶液中氯的转化率可达到 91 2 % .用FT IR ,XPS ,EDX ,SEM和元素分析法对树脂的结构进行了表征 ,引入功能基之后 ,树脂的孔隙明显增大 .

In a solid-liquid-liquid system using a crosslinked polymer as the solid phase, and an organic swelling agent and an aqueous solution of inorganic base as the two liquid phases, a novel chelating resin containing sulfur and oxygen, divinylbenzene crosslinked poly (2-hydroxyethylmereaptomethylstyrene), was prepared by the reaction of crosslinked chloromethylated polystyrene with 2-mercaptoethanol under phase transfer catalysis conditions. The phase transfer catalysts used were ten quaternary ammonium salts. FT-IR was employed to evaluate the reaction course. The effects of reaction time, reaction temperature, different catalysts, polarity of solvents and reactant ratio on chlorine conversion were investigated. The experimental results showed that the conversion of chlorine was 91.2% under the optimum conditions. The structure of the resin was characterized by FT-IR, XPS, EDX, and elemental analysis. The SEM analysis revealed that the introduction of functional groups increased the resin aperture.