𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Light-scattering study of random disorder in liquid crystalline elastomers

✍ Scribed by S. M. Clarke; E. Nishikawa; H. Finkelmann; E. M. Terentjev

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
958 KB
Volume
198
Category
Article
ISSN
1022-1352

No coin nor oath required. For personal study only.

✦ Synopsis

We report on the structural study of a non-uniform (polydomain) director texture in nematic and smectic liquid crystalline elastomers. Polarised light scattering is used to probe the equilibrium director correlations in the region of transition under stress between the opaque polydomain material and the transparent, macroscopically monodomain elastomer. A characteristic four-peak scattering image is obtained in this transient region. The lobes of intensity are oriented along and perpendicular to the axes of crossed polarisers, with anisotropy along the direction of principal extension. We propose a theoretical model, based on the competition between the random disordering field due to the network crosslinks and the external aligning field (mechanical stress) to explain the observations.

πŸ“œ SIMILAR VOLUMES

Study of the conformational disorder in
Study of the conformational disorder in polyesters giving liquid-crystalline phases
✍ Beniamino Pirozzi; Roberto Napolitano; Angela Tuzi; Roberto Centore πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 715 KB

## Abstract Conformational and packing energy analyses have been performed by molecular mechanics calculations on the polyester derived from the condensation of 2‐(4‐hydroxyphenyl)‐6‐hydroxybenzoxazole with terephthalic acid, which presents a high degree of crystallinity in spite of the head‐to‐tai

X-ray scattering studies of orientation
X-ray scattering studies of orientation in channel flows of a thermotropic liquid–crystalline polymer
✍ David K. Cinader Jr.; Wesley R. Burghardt πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 391 KB πŸ‘ 2 views

In situ wide-angle X-ray scattering (WAXS) orientation measurements are reported for a commercial thermotropic copolyester melt in channel flows. This investigation includes extensive examination of the orientation effects of mixed shearextensional kinematics produced by channel flows with varying c

Scaling behaviour of concentration fluct
Scaling behaviour of concentration fluctuations in a ternary liquid mixture: a dynamic light-scattering study
✍ A. Wakker; J.F. van Baar; W.J. van Lith πŸ“‚ Article πŸ“… 1990 πŸ› Elsevier Science 🌐 English βš– 440 KB

Dynamic light-scattering experiments with the ternary liquid mixture 4dimethylaminopyridine (DMAP), sulfolane, and water have shown that in the temperature range above the two-phase liquid-liquid region of this mixture, long-range concentration fluctuations exist, which obey a critical scaling law w