一种全亲水两嵌段共聚物的多重胶束化  

Schizophrenic Micellization of Novel Entirely Hydrophilic Diblock Copolymer

作　　者：张晓晖[1] 艾长军[1] 马敬红[1] 徐坚[1] 

机构地区：[1]东华大学纤维材料改性国家重点实验室,上海201620

出　　处：《高分子材料科学与工程》2011年第9期142-145,共4页Polymer Materials Science & Engineering

摘　　要：以1-氯代乙苯为引发剂,氯化亚铜/N,N,N′,N″,N″-五甲基二乙撑三胺(PMDETA)为催化体系,通过连续原子转移自由基聚合(ATRP)合成了聚丙烯酸叔丁酯-b-聚(甲基丙烯酸二甲胺基乙酯)(PtBA-b-PDMAEMA),然后用三氟乙酸将其水解,得到一种全亲水的嵌段共聚物聚丙烯酸-b-聚(甲基丙烯酸二甲胺基乙酯)(PAA-b-PDMAEMA)。将其溶于水中,只需要调节水的pH值就可以调节聚合物自组装完成从正向胶束到反向胶束的转变。在pH为2.4时,嵌段共聚物自组装形成以PDMAEMA为核,PAA为壳的核壳结构胶束(Dh=253.4 nm);当pH升高到10.0时,共聚物自组装形成核壳结构相反的反向胶束(Dh=279.9 nm)。进一步用动态光散射和透射电镜对胶束的温度敏感性进行了初步研究。Poly（t-butyl acrylate）-b-poly（2-dimethylamino）ethyl methacrylate（PtBA-b-PDMAEMA） was synthesized by sequential atom transfer radical polymerization（ATRP） using 1-Chlorophenylethane（1-PECl） as initiator and CuCl / N,N,N′,N″,N″-pentamethyldiethylenetriamine（PMDETA） as catalyst.Then the ＂Schizophrenic＂ block copolymer was obtained by hydrolysising PtBA-b-PDMAEMA using trifluoroacetic acid（TFA）.The dicopolymer can dissolved in water and self-assembled into micelles/reversed micelles by adjusting pH value of solution.In water of pH 2.4,the block copolymer self-assembled into micelles（Dh=253.4 nm） of PDMAEMA as shell and polyacrylic acid（PAA） as core,increasing pH to 10.0,the dicopolymer self-assembled into reversed micelles（Dh=279.9 nm）.The tuning nanostructure morphology of micelles and thermo-sensitive behavior have investigated by hydrodynamic diameter Dh from dynamic light scattering（DLS） and transmission electron microscopy（TEM） micrographs.

关 键 词：原子转移自由基聚合 全亲水嵌段共聚物 自组装 正向胶束-反向胶束 

分 类 号：TQ316.344[化学工程—高聚物工业]