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末端含C_(60)单链窄分子量分布高分子在溶液中的自组装行为被引量:1
2001年
A hammer like C 60 conjugated polystyrene was synthesized via atom transfer radical polymerization using bromine ended polystyrene as an initiator.The self assembly aggregating behavior of the hammer like polymer was investigated by DLS,GPC and TEM.Two narrow distributions with hydrodynamic radius 29 5 nm and 1 3 nm were observed in DLS,attributed respectively to the aggregates and single hammer like polymer molecules.In the eluograph of GPC,two distributions were also observed,attributed respectively to the aggregates and single hammer like polymer.In TEM,micelle particles with average diameter 65 nm were observed,agreed well with the results obtained by DLS.The diameter of aggregates of two hammer like C 60 conjugated polystyrene samples was compared and possible explanations were proposed.
黎淳昭张炜程周鹏杜福胜李子臣李福绵
关键词:原子转移自由基聚合自组装碳60高分子溶液
规整链球型含C_(60)聚苯乙烯的亲水化修饰及其在水中的自组装
2002年
To achieve well defined amphiphilic C 60 containing macromolecules,C 60 conjugated polystyrene(C 60 PS)was first synthesized via tandem atom transfer radical polymerization(ATRP).With the help of tetrabutylammonium bromide(TBAB),taurine(2 aminoethanesulfonic acid) can be carried from water phase into the phenyl chloride phase and then react with C 60 PS.The final product——taurine modified C 60 conjugated polystyrene—is a novel type of highly asymmetric amphiphilic diblock copolymers,which can form spherical crew cut type micelles by adding water in small amounts into its tetrahydrofuran solution.UV vis spectroscopy and trasmission electronic microscopy have been employed to monitor the aggregating process of these spherical micelles and observe their final morphology respectively.
张炜程黎淳昭魏柳荷周鹏杜福胜李子臣李福绵
关键词:C60聚苯乙烯自组装透射电镜
规整分子量链球型含C<,60>高分子的合成及其在溶液中的聚集行为
该论文用原子转移自由基(ATRP)合成了规整分子量的含C<,60>链球型疏水性和亲水性高分子,并研究了它们在不同溶剂中的自组装行为.比较了五甲基二乙基三胺(PMDETA)与联吡啶(Bipy)作为配体在原子转移自由基聚合(...
黎淳昭
关键词:原子转移自由基聚合PMMA囊泡自组装
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规整链球型含C_(60)聚(丙烯酸β-羟乙酯)的合成及其在水中的自组装被引量:3
2002年
Atom transfer radical polymerization of protected 2 hydroxyethyl acrylate (HEA\|TMS) was conducted to prepare well\|defined bromo\|terminated macroinitiators,which were further allowed to react with large excess amount of C 60 under ATRP condition.A well defined hammer shaped C 60 PHEA was then obtained by hydrolysis of C 60 PHEA TMS under mild conditions.A TEM observation of the association behavior of these well defined hammer like C 60 PHEA macromolecules showed that they assemble into spherical vesicles in water.Their characteristic inner water phase was further confirmed by fluorescence probe method.Also,it was found that the size of vesicles decreased as the increase of molecular weight of PHEA.
黎淳昭张炜程魏柳荷杜福胜李子臣李福绵
关键词:碳60原子转移自由基聚合囊泡透射电镜自组装
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