Abstract

ABSTRACTElectric and magnetic fields have been used to measure the splay and bend elastic constants (k11kn and k33) in a series of monomeric-polymeric nematic liquid crystal solutions using the Freedericksz transition. Using pentyl cyanobiphenyl as the monomeric solvent, solutions of a polysiloxane copolymer were studied up to a maximum concentration of 40% w/w. The results show that k11, k33 and k33/k11 decrease with increasing polymer concentration and also for the higher concentrations that the ratio k33/k11 becomes virtually independent of temperature.

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