Monte Carlo simulations of the morphology of ABC star polymers using the diagonal bond method

被引：137

作者：

Gemma, T ^{[1
]}

Hatano, A

Dotera, T

机构：

[1] Univ Tokyo, Dept Basic Sci, Meguro Ku, Tokyo 1538902, Japan

[2] Teikyo Heisei Univ, Dept Informat Syst, Uruido, Ichikawa 2900193, Japan

[3] Univ Air, Saitama Study Ctr, Saitama 3310851, Japan

来源：

MACROMOLECULES | 2002年 / 35卷 / 08期

关键词：

D O I：

10.1021/ma001040q

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The microphase-separated morphology of ABC three-arm star-shaped copolymers with arm-length ratio 1:1:x is investigated by a recently proposed simulation method, the diagonal bond method. Five kinds of two-dimensional (cylindrical) phases, three kinds of lamellar-type phases and two kinds of continuous matrix phases are discovered. The phase diagram is presented: The progression of the morphologies as a function of x is the following: lamella + sphere; five polygonal cylinders, [8.8.4], [6.6.6], [8.6.4; 8.6.6], [10.6.4; 10.6.4; 10.6.6], [12.6.4]; perforated layer; lamella + cylinder; columnar piled disk; lamella-in-sphere. Two remarkable features of ABC star polymer systems are found: first, in all phases junction point monomers gather on lines where three interfaces meet, and second, the section of the cylindrical phase becomes the tessellation of even-numbered polygons. The free energy of the system is also calculated in the strong segregation limit for four kinds of simple phases, and the results are consistent with the simulations.

引用

页码：3225 / 3237

页数：13

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