Effect of an Ionic Liquid Solvent on the Phase Behavior of Block Copolymers

被引：54
|
作者：
Virgili, Justin M. [1 ,2 ]
Hoarfrost, Megan L. [1 ,3 ]
Segalman, Rachel A. [1 ,2 ]
机构：
[1] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA
[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Energy & Environm Technol Div, Berkeley, CA 94720 USA
来源：
MACROMOLECULES | 2010年 / 43卷 / 12期
关键词：
BRONSTED ACID-BASE; THIN-FILM TRANSISTORS; DIBLOCK COPOLYMERS; SELECTIVE SOLVENTS; FUEL-CELLS; POLYMER; ELECTROLYTES; MICELLES; MEMBRANES; BLENDS;
D O I：
10.1021/ma902804e
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 phase behavior of concentrated mixtures of block copolymers with an ionic liquid has been studied using a large series of block copolymers with varying molecular weight and volume traction to gain a thorough understanding of the thermodynamics of self-assembly. The lyotropic phase behavior of mixtures of poly(styrene-block-2-vinylpyridine) (S2VP) copolymers with the ionic liquid imidazolium bis(trifluoromethane)sulfonimide ([Im][TFSI]) is reminiscent of block copolymer/selective molecular solvent mixtures, and ordered microstructures corresponding to lamellae, hexagonally close-packed cylinders, body-centered cubic, and face-centered cubic oriented micelles are observed. Scaling analysis reveals that, in contrast to observations of block copolymer/molecular solvent mixtures, the interfacial area occupied by each S2VP chain decreases upon the addition of [Im][TFSI], indicating a considerable increase in the effective segregation strength of the S2VP copolymer with ionic liquid addition.
引用
收藏
页码：5417 / 5423
页数：7
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