Orientation-Dependent Order-Disorder Transition of Block Copolymer Lamellae in Electric Fields

被引：17

作者：

Schoberth, Heiko G. ^{[1
]}

Pester, Christian W. ^{[1
]}

Ruppe, Markus ^{[3
]}

Urban, Volker S. ^{[4
]}

Boeker, Alexander ^{[1
,2
]}

机构：

[1] Rhein Westfal TH Aachen, DWI RWTH Aachen eV, Lehrstuhl Makromol Mat & Oberflachen, D-52056 Aachen, Germany

[2] Rhein Westfal TH Aachen, JARA FIT, D-52056 Aachen, Germany

[3] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA

[4] Oak Ridge Natl Lab, Biol & Soft Matter Div, Oak Ridge, TN 37831 USA

来源：

ACS MACRO LETTERS | 2013年 / 2卷 / 06期

关键词：

MICROPHASE SEPARATION; DIBLOCK COPOLYMERS; MICROSTRUCTURE; TEMPERATURE; ALIGNMENT; INTERFACE; POLYMERS; DILUTION; FLUIDS;

D O I：

10.1021/mz400013u

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Electric fields have been shown to stabilize the disordered phase of near-critical block copolymer solutions. Here, we use in situ synchrotron small-angle X-ray scattering to examine how the initial orientation of lamellar domains with respect to the external field (phi) affects the shift in the order-disorder transition temperature (T-ODT) of lyotropic solutions of poly(styrene-b-isoprene) in toluene. We find a downward shift of the transition temperature, which scales with lamellar orientation as Delta T-ODT similar to cos(2) phi, in accordance with theory.

引用

页码：469 / 473

页数：5

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