Rotational Viscosity Coefficient of Poly(Benzyl Glutamate) Liquid Crystals: Temperature and Concentration Dependence

The temperature and concentration dependence of the rotational viscosity coefficient of poly(benzyl glutamate) liquid crystals in dichloromethane have been measured by magnetic reorientation experiments. The viscosity is found to vary exponentially with the volume fraction of polymer over the range 0.10 to 0.25. The activation energy varies linearly with polymer concentration and extrapolates to the activation energy of pure solvent at zero polymer volume fraction.