Matsushita Yushu, Hayashida Kenichi, Takano Atsushi
Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603 Japan.
Macromol Rapid Commun. 2010 Sep 15;31(18):1579-87. doi: 10.1002/marc.201000169. Epub 2010 Jul 8.
Among several star molecules studied so far, the results for two similar but slightly different systems composed of all hydrophobic components, i.e. one low T(g) arm and two high T(g) arms were compared and discussed mainly. They are polyisoprene-arm-polystyrene-arm-poly(2-vinylpyridine) stars and polystyrene-arm-polybutadiene-arm-poly(2-vinylpyridine) ones, and are abbreviated as ISP and SBV, respectively, in the original literatures. Several periodic Archimedean tiling patterns can be naturally formed when the relative lengths of three chains are similar one another in both series. Core-shell type morphologies and actually three-phase four layer lamellar structures were also commonly observed for two series. A quasicrystalline tiling with dodecagonal symmetry can also be conformed at the targeted composition of ISP/homopolymer blend and a zinc-blende type structure was created at just a little outside of tiling region for the same blend. Furthermore, the several interesting structures from amphiphilic molecules, composed of a hydrophilic component, poly(ethylene oxide), a hydrophobic component, polymethylmethacrylate and a highly water-repellent polymer poly(perfluoropropyleneoxide) are described and introduced.
在目前已研究的几种星形分子中，主要比较和讨论了由全疏水成分组成的两个相似但略有不同的体系的结果，即一个低玻璃化转变温度（T(g)）臂和两个高T(g)臂的体系。它们分别是聚异戊二烯臂-聚苯乙烯臂-聚（2-乙烯基吡啶）星形分子和聚苯乙烯臂-聚丁二烯臂-聚（2-乙烯基吡啶）星形分子，在原始文献中分别简称为ISP和SBV。当两个系列中三条链的相对长度彼此相似时，几种周期性的阿基米德镶嵌图案可以自然形成。两个系列还普遍观察到核壳型形态以及实际上的三相四层层状结构。在ISP/均聚物共混物的目标组成下，也可以形成具有十二边形对称性的准晶镶嵌，并且在相同共混物的镶嵌区域之外稍远处形成了闪锌矿型结构。此外，还描述并介绍了由亲水性成分聚环氧乙烷、疏水性成分聚甲基丙烯酸甲酯和高拒水聚合物聚（全氟环氧丙烷）组成的两亲分子的几种有趣结构。
