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

Title data

Pester, Christian W. ; Schmidt, Kristin ; Ruppel, Markus ; Schoberth, Heiko G. ; Böker, Alexander:
Electric-Field-Induced Order–Order Transition from Hexagonally Perforated Lamellae to Lamellae.
In: Macromolecules. Vol. 48 (2015) Issue 17 . - pp. 6206-6213.
ISSN 1520-5835
DOI: https://doi.org/10.1021/acs.macromol.5b01336

Official URL:

Abstract in another language

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.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Institutions of the University:	Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II Research Institutions > Collaborative Research Centers, Research Unit > SFB 481 Komplexe Makromolekül- und Hybridsysteme in inneren und äußeren Feldern Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Research Institutions Research Institutions > Collaborative Research Centers, Research Unit
Result of work at the UBT:	Yes
DDC Subjects:	500 Science > 530 Physics 500 Science > 540 Chemistry
Date Deposited:	04 Mar 2016 08:09
Last Modified:	28 Jul 2023 05:17
URI:	https://eref.uni-bayreuth.de/id/eprint/31343