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丙烯酰胺在聚乙二醇水溶液中的聚合动力学
引用本文:单国荣,曹志海,黄志明,翁志学.丙烯酰胺在聚乙二醇水溶液中的聚合动力学[J].高分子学报,2003(6):784-788.
作者姓名:单国荣  曹志海  黄志明  翁志学
作者单位:浙江大学化工系高分子工程研究所,杭州,310027
基金项目:国家自然科学基金 (基金号 2 0 2 760 5 9)资助项目
摘    要:用改进溴法对丙烯酰胺 (AM)在聚乙二醇 (PEG)水溶液中聚合动力学进行研究 .在单一和氧化还原引发体系中分别考察了引发剂、单体和PEG用量、不同HLB值乳化剂以及聚合温度等因素对动力学的影响 .得到AM聚合速率与过硫酸铵 (APS)浓度的 0 91次方成正比 ;单一APS和APS 三乙醇胺 (TEA)氧化还原引发体系中的AM聚合表观活化能分别为 96 1和 4 2 3kJ mol.

关 键 词:动力学  丙烯酰胺  聚乙二醇
修稿时间:2002年11月6日

KINETICS OF ACRYLAMIDE POLYMERIZATION IN POLYETHYLENE GLYCOL AQUEOUS SOLUTIONS
SHAN Guorong,CAO Zhihai,HUANG Zhiming,WENG Zhixue.KINETICS OF ACRYLAMIDE POLYMERIZATION IN POLYETHYLENE GLYCOL AQUEOUS SOLUTIONS[J].Acta Polymerica Sinica,2003(6):784-788.
Authors:SHAN Guorong  CAO Zhihai  HUANG Zhiming  WENG Zhixue
Abstract:The advantages of acrylamide (AM) polymerization in polyethylene glycol (PEG) aqueous solutions are the lower viscosity and higher monomer concentration of the polymerization system.It may be used to prepare water soluble polymers with high molecular weight which can be directly diluted for use.It overcomes the problems of mixing and heat transfer of polymerization systems,low polymerization rate,and qualities of products in the aqueous homogenous polymerization.On the other hand,AM polymerization in PEG aqueous solutions is performed in water without using any organic solvents.It also overcomes the pollution and recycle problems of organic solvents for inverse phase suspension polymerization,water-in-oil inverse phase emulsion polymerization and precipitation polymerization.It is a new polymerization method for preparing water soluble (co)polymers.In this paper kinetics of AM polymerization in PEG aqueous solutions were studied by the improved bromating method.The effects of initiator,monomer and PEG concentrations,emulsifiers with various HLB values,and polymerization temperature on kinetics of AM polymerization in PEG aqueous solutions initiated by single and redox initiators were investigated.It is found that the monomolecular termination is more than the bimolecular one for AM polymerization in PEG aqueous solutions.The apparent activation energy of polymerization initiated by ammonium persulfate-triethanal amine (APS-TEA) redox initiator (E a=42.3 kJ/mol) is smaller than that by single initiator APS (E a=96.1 kJ/mol).
Keywords:Kinetics  Acrylamide  Polyethylene glycol
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