五嵌段含氟/硅共聚物[PDMS-b-（PMMA-b-PFMA）₂]的构筑及自组装特性

【作者】 和玲； 梁军艳； 牛明俊； 董夏；

【机构】 西安交通大学理学院应用化学系；

【摘要】 本文以合成的双官能团聚硅氧烷(Br-PDMS-Br)为大分子引发剂,采用ATRP法依次引发甲基丙烯酸甲酯(MMA)和含氟丙烯酸酯(FMA)链段,合成了四种ABCBA线型含氟/硅五嵌段[PDMS-b-(PMMA-b-PFMA)2]共聚物。FMA分别为甲基丙烯酸三氟乙酯(3FMA)、甲基丙烯酸六氟丁酯(6FMA)、甲基丙烯酸八氟戊酯(8FMA)和甲基丙烯酸十二氟庚酯(12FMA)。分别采用1H-NMR和GPC表征了五嵌段共聚物的结构,用静态接触角(SCA)和X-射线光电子能谱(XPS)分析了五嵌段共聚物膜的表面自由能和元素分布特点,用动态光散射仪(DLS)分析了五嵌段共聚物在CHCl3、THF、TFT及CHCl3-TFT溶剂中自组装聚集体的粒径大小以及单聚体和胶束的粒径分布,用石英微晶天平(QCM-D)跟踪分析了五嵌段共聚物在不同溶剂中挥发成膜的吸水动态分布及分子的排列稳定性。更多还原

【Abstract】 Four fluorine-silicon-containing pentablock copolymers [PDMS-b-(PMMA-b-PFMA)2],consisting of poly(dimethylsiloxane)(PDMS),poly(methyl methacrylate)(PMMA)and the different poly(fluorinated methacrylate)(PFMA)of 3FMA,6FMA,8FMA and 12FMA,separately,have been synthesized by two steps of atom transfer radical polymerization(ATRP).The chemical structures of [PDMS-b-(PMMA-b-PFMA)2] are characterized by 1H-NMR and GPC analysis.The surface free energy of the films obtained from PDMS-(b-PMMA-b-PFMA)2 are studied by static contact angle(SCA)and X-ray photoelectron spectroscopy(XPS).The self-assembly behavior of [PDMS-b-(PMMA-b-PFMA)2] copolymers in the selected solvents is investigated by dynamic light scattering(DLS)analysis and quartz crystal microbalance with dissipation(QCM-D)measurements.更多还原