通过引入第二个嵌段，使末端为 2-全氟辛基乙基甲基丙烯酸酯的聚甲基丙烯酸甲酯表面的富集增强。
Enhanced surface segregation of poly(methyl methacrylate) end-capped with 2-perfluorooctylethyl methacrylate by introduction of a second block.
机构信息
Department of Chemistry, Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Education Ministry, Zhejiang Sci-Tech University, Hangzhou 310018, China.
出版信息
J Colloid Interface Sci. 2012 Jan 1;365(1):260-7. doi: 10.1016/j.jcis.2011.09.021. Epub 2011 Sep 21.
New fluorinated copolymers of poly(methyl methacrylate)-b-poly(butyl methacrylate) or poly(n-octadecyl methacrylate) end-capped with 2-perfluorooctylethyl methacrylate (PMMA(x)-b-PBMA(y)-ec-PFMA(z) or PMMA(x)-b-PODMA(y)-ec-PFMA(z)) were synthesized by living atom transfer radical polymerization. Thin films made of PMMA(230)-b-PODMA(y)-ec-PFMA(1) were characterized by differential scanning calorimetry, angle-resolved X-ray photoelectron spectroscopy and X-ray diffraction. These films were found to exhibit robust surface segregation of the end groups. Furthermore, the fluorine enrichment factor at the film surface was found to increase linearly with increasing degree of polymerization of poly(n-octadecyl methacrylate) and its increasing fusion enthalpy in the second block, which enhances the segregation of the fluorinated moieties.
新型含氟嵌段共聚物 PMMA(x)-b-PBMA(y)-ec-PFMA(z) 或 PMMA(x)-b-PODMA(y)-ec-PFMA(z) 由聚甲基丙烯酸甲酯（PMMA）和聚（正十八烷基甲基丙烯酸酯）（PODMA）两亲性嵌段共聚物经原子转移自由基聚合（ATRP）制备得到。通过差示扫描量热法（DSC）、角分辨 X 射线光电子能谱（AR-XPS）和 X 射线衍射（XRD）对 PMMA(230)-b-PODMA(y)-ec-PFMA(1) 薄膜进行了表征。结果表明，这些薄膜表现出较强的末端基团表面选择性富集。此外，随着聚（正十八烷基甲基丙烯酸酯）的聚合度增加以及其二嵌段的熔融焓增加，氟化物在薄膜表面的富集因子呈线性增加，这增强了氟化物的选择性富集。
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