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《Chinese Journal of Colloid and Polynier》 2001-03
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Temperatre-responsive Properties of Copolymers Having PNIPAAm Segment

Chen Yu,Chen Mingqing,Liu Xiaoya,Yang Cheng (School of Chemical and Material Engineering.Southern Yangtze University,Wuxi,214036)  
The copolymers,Poly(N-isopropylacrylamide-co-methyl methacrylate),Poly(N-isopropylacryamide-co-methacrylic acid) and poly(N-isopropylacrylanide-co-methylmethacrylate-co-methacrylic acid),were synthesized by free-radical copolymerization using AIBN as an initiator,The molecular Weights of the copolymers were measured by GPC.The lower critical solution temperature(LCST)of copolymers measured by UV/Vis spectrophotometer at 400nm were lower than LCST of Poly(N-Isopropylacrylamide)based on MMA and MAA segments which were lower hydrophilic than NIPAAm segment.The LCST of copolymers were lowered linearly when salt concentrations were increased in the solution.The LCST of Poly(NIPAAm-co-MAA) and Poly(NIPAAm-co-MMA-co-MAA)were dependent on pH of their solution at high pH range.It means that the two copolymers are Temperature-responsive and pH-responsive ones.
【Fund】: 教育部留学回国启动基金资助项目
【CateGory Index】: O631.2
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