Electric-Field-Induced Order-Order Transition from Hexagonally Perforated Lamellae to Lamellae

被引：23

作者：

Pester, Christian W. ^{[1
,2
]}

Schmidt, Kristin ^{[3
]}

Ruppel, Markus ^{[5
]}

Schoberth, Heiko G. ^{[4
]}

Boeker, Alexander ^{[5
]}

机构：

[1] Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA

[2] Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA

[3] Univ Bayreuth, Lehrstuhl Phys Chem 2, D-95447 Bayreuth, Germany

[4] Univ Bayreuth, Lehrstuhl Mat & Prozesssimulat, D-95447 Bayreuth, Germany

[5] Univ Potsdam, Fraunhofer Inst Angew Polymerforsch, Lehrstuhl Polymermat & Polymertechnol, D-14476 Potsdam, Germany

来源：

MACROMOLECULES | 2015年 / 48卷 / 17期

关键词：

BLOCK-COPOLYMER MICROSTRUCTURE; DIBLOCK COPOLYMER; PHASE-BEHAVIOR; DISORDER TRANSITION; THIN-FILMS; LAYER PHASE; INDUCED ALIGNMENT; MELTS; MECHANISMS; ORIENTATION;

D O I：

10.1021/acs.macromol.5b01336

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Block copolymers form a variety of microphase morphologies due to their ability to phase separate. The hexagonally perforated lamellar (HPL) morphology represents an unusually long-lived, nonequilibrium transient structure between lamellar and cylindrical phases. We present a detailed study of a concentrated, HPL-forming poly(styrene-b-isoprene) diblock copolymer solution in toluene in the presence of an electric field. We will show that this phase is readily aligned by a moderate electric field and provide experimental evidence for an electric-field-induced order order transition toward the lamellar phase under sufficiently strong fields. This process is shown to be fully reversible as lamellar perforations reconnect immediately upon secession of the external stimulus, recovering highly aligned perforated lamellae.

引用

页码：6206 / 6213

页数：8

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