两亲性星状共聚物的合成、表征和性能

以对氯甲基苯乙烯为引发单体和N-乙烯基吡咯烷酮为接枝单体,连续两次运用原子转移自由基聚合,制备了以对氯甲基苯乙烯超支化聚合物(PCMS)为核,聚乙烯基吡咯烷酮(PVP)为臂的星状接枝共聚物(PCMS-g-PVP).用红外光谱(IR),核磁共振氢谱(1HNMR),凝胶渗透色谱(GPC)等手段表征了其结构.这种星状共聚物在水中不溶,但可溶于碱水溶液,加热可熔融,因此有望作为非交联型高吸水性树脂应用.同时研究了树脂的吸水率和吸液率与共聚物中聚乙烯基吡咯烷酮链节数的关系.

Synthesis,Characterization and Properties of Amphiphilic Star-shaped Copolymer

The star-shaped copolymers with a hyperbranched polychloromethyl styrene(PCMS) core and linear polyvinyl pyrrolidone(PVP) arms (PCMS-g-PtBMA) were prepared by using atom transfer radical polymerization (ATRP) continually with 4-chloromethyl styrene (CMS) as the inimer and N-vinyl pyrrolidone (NVP) as the graft monomer. The structure of the aforementioned copolymers was characterized with infra-red spectrometry (IR) .hydrogen nuclear magnetic resonance (1HNMR) and gel permeation chromatography (GPC). These kinds of star-shaped copolymers can not dissolve in water, but can dissolve in basic solution and meltable when they are heated. So they are hopeful to be used as a non-closslinked super water absorbent resin. The relationship of the water absorption factor or liquid absorption factor of the resin and the length of PVP arms in the hyperbranched amphiphilic star-shaped copolymer was studied.