Formation of Tetragonally-Packed Rectangular Cylinders from ABC Block Terpolymer Blends

被引：40

作者：

Asai, Yusuke ^{[1
]}

Yamada, Kotaro ^{[1
]}

Yamada, Mutsuhiko ^{[1
]}

Takano, Atsushi ^{[1
]}

Matsushita, Yushu ^{[1
]}

机构：

[1] Nagoya Univ, Grad Sch Engn, Dept Appl Chem, Chikusa Ku, Nagoya, Aichi 4648603, Japan

来源：

ACS MACRO LETTERS | 2014年 / 3卷 / 02期

关键词：

MICROPHASE-SEPARATED STRUCTURE; TRIBLOCK COPOLYMER; MICRODOMAIN MORPHOLOGY; DIBLOCK COPOLYMERS; GYROID STRUCTURE; SQUARE ARRAYS; STYRENE; ISOPRENE; FILMS; CAST;

D O I：

10.1021/mz400647v

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Effect of composition distribution of ABC linear terpolymers on the formation of periodic structures was investigated. Five poly(isoprene-b-styrene-b-2-vinylpyridine) (ISP) triblock terpolymers with almost constant molecular weights of ca. 130k and with similar center-block fraction at around 0.55, were blended variously. It has been found that tricontinuous gyroid structures gradually transform into a cylindrical structure whose rectangular cylinders are packed tetragonally if composition distribution increases. Further experiments by 3D-TEM observation on binary equimolar mixtures of two molecules with similar molecular weights of 122k and 124k, giving the average composition of phi(1)/phi(S)/phi(P) = 0.23/0.59/0.18, has verified to show more evident rectangular-shaped cylinders with 4-fold symmetry. This new structure, having periodic surfaces with nonconstant mean-curvature, could be formed due to the systematic localization of component polymer chains along the domain interfaces.

引用

页码：166 / 169

页数：4

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