Dynamic light scattering studies of cholesteric and polymer-stabilized cholesteric liquid crystals
Abstract
Dynamic light scattering of pure cholesteric and polymer-stabilized cholesteric liquid crystals shows two relaxation modes: twist and viscous-splay (umbrella). The twist mode is diffusive, whereas the frequency associated with the viscous-splay deformation goes to a constant at zero scattering angle. In the presence of polymer networks the frequency corresponding to the twist deformation decreases as a result of an increase in the viscosity, but the frequency associated with the viscous-splay deformation increases. This is attributed to the breakup of cholesteric domains by the polymer network.
- Publication:
-
Physical Review E
- Pub Date:
- September 1998
- DOI:
- 10.1103/PhysRevE.58.R2717
- Bibcode:
- 1998PhRvE..58.2717B
- Keywords:
-
- 61.30.Eb;
- Experimental determinations of smectic nematic cholesteric and other structures