TY  - JOUR
A1  - Kathrein, Christine C.
A1  - Kipnusu, Wycliffe K.
A1  - Kremer, Friedrich
A1  - Böker, Alexander
T1  - Birefringence Analysis of the Effect of Electric Fields on the Order-Disorder Transition Temperature of Lamellae Forming Block Copolymers
JF  - Macromolecules : a publication of the American Chemical Society
N2  - A detailed birefringence analysis of the effect of strong dc electric fields on the order-disorder transition temperature (T-ODT) of lamella forming block copolymers is reported. The setup presented here enabled the measurement of the T-ODT with high temperature resolution while the birefringence measurements were nondestructive and straightforward compared to alternative methods. A downward shift in the transition temperature was found for all samples upon application of the electric field. The data indicate that the dominating parameter that evokes the mixing of block copolymers when exposed to electric fields is the difference in dielectric permittivity Delta epsilon between the block copolymer constituents. The extent to which the T-ODT is shifted is furthermore influenced by the degree of polymerization N. Shifts in the transition temperature of up to 7 degrees C were found upon application of an electric field of 5 kV/mm.
Y1  - 2015
U6  - https://doi.org/10.1021/acs.macromol.5b00512
SN  - 0024-9297
SN  - 1520-5835
VL  - 48
IS  - 10
SP  - 3354
EP  - 3359
PB  - American Chemical Society
CY  - Washington
ER  -