DYNAMIC INVESTIGATION IN A NEMATIC MIXTURE WITH HIGH GLASS-TRANSITION TEMPERATURE

被引:19
作者
KRESSE, H [1 ]
ERNST, S [1 ]
WEDLER, W [1 ]
DEMUS, D [1 ]
KREMER, F [1 ]
机构
[1] MAX PLANCK INST POLYMER RES,W-6500 MAINZ,GERMANY
来源
BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1990年 / 94卷 / 12期
关键词
WORTER;
D O I
10.1002/bbpc.199000062
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Dielectric measurements have been performed on oriented samples of a nematic mixture with a glass-transition temperature of about 285 K in a frequency range between 0.1 and 10(6) Hz and on unoriented, quenched samples of this mixture from 156 K up to 300 K. Rotations around the short and long molecular axis gave a Vogel-Fulcher-Tammann-behaviour; the seperate rotation of polar end-groups caused the appearance of a high-frequency-Arrhenius-like mechanism which was observable at very low temperatures.
引用
收藏
页码:1478 / 1483
页数:6
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