TY  - JOUR
A1  - Pester, Christian W.
A1  - Schmidt, Kristin
A1  - Ruppel, Markus
A1  - Schoberth, Heiko G.
A1  - Böker, Alexander
T1  - Electric-Field-Induced Order-Order Transition from Hexagonally Perforated Lamellae to Lamellae
JF  - Macromolecules : a publication of the American Chemical Society
N2  - 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.
Y1  - 2015
U6  - https://doi.org/10.1021/acs.macromol.5b01336
SN  - 0024-9297
SN  - 1520-5835
VL  - 48
IS  - 17
SP  - 6206
EP  - 6213
PB  - American Chemical Society
CY  - Washington
ER  -