Research output: Contribution to journal › Article › peer-review
Electrical and dynamooptical properties of Frechet dendron-modified polystyrene molecules in solutions. / Lezov, A. V.; Polushina, G. E.; Kovshik, S. A.; Mikhailova, M. E.; Semenikhina, T. N.; Kovshik, A. P.; Ryumstev, E. I.
In: Polymer Science - Series A, Vol. 48, No. 7, 01.07.2006, p. 723-730.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Electrical and dynamooptical properties of Frechet dendron-modified polystyrene molecules in solutions
AU - Lezov, A. V.
AU - Polushina, G. E.
AU - Kovshik, S. A.
AU - Mikhailova, M. E.
AU - Semenikhina, T. N.
AU - Kovshik, A. P.
AU - Ryumstev, E. I.
PY - 2006/7/1
Y1 - 2006/7/1
N2 - The electrooptical, dynamic, and dielectric characteristics of polystyrene modified by the Frechet dendrons of 1-4 generations have been studied in benzene, chloroform, and THF solutions. It has been shown that the Kerr constant and the shear optical coefficient for all the studied polymers coincide in sign and their absolute values increase with the dendron generation number. The intrinsic optical anisotropy of the repeating unit of dendronized polystyrene molecules is negative in sign, and its absolute value tends to grow with an increase in the generation number of dendrons. The frequency dispersions of the Kerr constant and of the dielectric polarization have been discovered for solutions of the modified polymer. The ratio between the times of relaxation characterizing the dispersion of dielectric permittivity and of the Kerr constant of solutions and the times of a rise and decay of electric birefringence measured on the onset and termination of the rectangular-pulsed field does not obey the longitudinal relaxation theory for polar macromolecules. The relaxation times of dielectric polarization and of electric birefringence tend to increase with the dendron generation number.
AB - The electrooptical, dynamic, and dielectric characteristics of polystyrene modified by the Frechet dendrons of 1-4 generations have been studied in benzene, chloroform, and THF solutions. It has been shown that the Kerr constant and the shear optical coefficient for all the studied polymers coincide in sign and their absolute values increase with the dendron generation number. The intrinsic optical anisotropy of the repeating unit of dendronized polystyrene molecules is negative in sign, and its absolute value tends to grow with an increase in the generation number of dendrons. The frequency dispersions of the Kerr constant and of the dielectric polarization have been discovered for solutions of the modified polymer. The ratio between the times of relaxation characterizing the dispersion of dielectric permittivity and of the Kerr constant of solutions and the times of a rise and decay of electric birefringence measured on the onset and termination of the rectangular-pulsed field does not obey the longitudinal relaxation theory for polar macromolecules. The relaxation times of dielectric polarization and of electric birefringence tend to increase with the dendron generation number.
UR - http://www.scopus.com/inward/record.url?scp=33747046405&partnerID=8YFLogxK
U2 - 10.1134/S0965545X06070091
DO - 10.1134/S0965545X06070091
M3 - Article
AN - SCOPUS:33747046405
VL - 48
SP - 723
EP - 730
JO - Polymer Science - Series A
JF - Polymer Science - Series A
SN - 0965-545X
IS - 7
ER -
ID: 33911425