甲基聚氧化乙烯酯化反应及其动力学  

CATALYTIC ESTERIFICATION AND KINETIC STUDY OF POLYETHYLENEOXIDE AND ACRYLIC ACID

作　　者：游长江[1] 莫海[1] 胡国栋[1] 张珊[1] 贾德民[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《高分子材料科学与工程》2004年第6期87-89,共3页Polymer Materials Science & Engineering

基　　金：广东省科技攻关项目(2KM02001G)

摘　　要：研究了甲基聚氧化乙烯与丙烯酸在不同催化剂作用下的酯化反应,探讨了酯化的动力学,并建立了动力学方程。试验表明,最佳的酯化催化剂为对甲苯磺酸。The water-reducing agent is one of the most necessary additives in modern concrete making. The polycarboxylate-type superplasticizer is the best water-reducing agent with high performance up to now. In this paper, a superplasticizer was synthesized by poly(ethyleneoxide)(PEO), acrylic acid, and initiator. The synthetic method is divided into two steps: (1) The esterification of poly(ethyleneoxide) (PEO) and acrylic acid; (2) polymerization in the presence of water. The effects of catalysts such as phosphoric acid, sulfuric acid, p-toluene sulfonic acid, silicotungstic acid and solid super acid on the esterification of poly(ethyleneoxide) (PEO) and acrylic acid were studied. The results show that the optimal catalyst is p-toluene sulfonic acid. Moreover the kinetics under p-toluene sulfonic acid was obtained.

关 键 词：酯化 动力学 对甲苯磺酸 甲基聚氧化乙烯 

分 类 号：O631.5[理学—高分子化学]