SYNTHESIS AND POLYMERIZATION OF OLIGO (OXYETHYLENE) MACROMONOMER

【摘要】 <正> This paper reports the synthesis of methoxyoligo （oxyethylene） methacrylate （MEO_n , n is the repeating unit number of （CH₂CH₂O） in the macromonomer）, and its polymerization in different solvents. MEO_n is prepared through such two independent reactions as （1） anionic polymerization of oxirane initiated by potassium alkoxide and （2） end-capping of methoxy oligo（oxyethylene） by methacrylic group. The n value can be conveniently controlled over the range of 5 ～30 by varying the molar ratio of oxirane to initiator and the molecular weight distribution of MEO_n be narrowed by increasing reaction time only in step （1）. MEO_n thus obtained shows a rapid polymerization in water and benzene respectively, and both give water-soluble polymers as long as suitable conditions are used.更多还原

【Abstract】 This paper reports the synthesis of methoxyoligo （oxyethylene） methacrylate （MEO_n , n is the repeating unit number of （CH₂CH₂O） in the macromonomer）, and its polymerization in different solvents. MEO_n is prepared through such two independent reactions as （1） anionic polymerization of oxirane initiated by potassium alkoxide and （2） end-capping of methoxy oligo（oxyethylene） by methacrylic group. The n value can be conveniently controlled over the range of 5 ～ 30 by varying the molar ratio of oxirane to initiator and the molecular weight distribution of MEO_n be narrowed by increasing reaction time only in step （1）. MEO_n thus obtained shows a rapid polymerization in water and benzene respectively, and both give water-soluble polymers as long as suitable conditions are used.更多还原