OPTICAL-DYNAMIC, AND ELECTRIC PROPERTIES OF SOLUTIONS OF CELLULOSE CARBANILATE IN DIOXANEE AND ETHYL-ACETATE

Flow birefringence, equilibrium and nonequilibrium electric birefringe nce in solutions of cellulose carbanilate (CC) in dioxane and ethyl ac etate were studied over a wide range of molecular masses. The values o f optical anisotropy DELTAa of the monomer unit of cellulose carbanila te in dioxane and in ethyl acetate were found to be -40 x 10(-25) cm3 and -18 x 10(-25) cm3, respectively. From the measurements of nonequil ibrium electric birefringence of low-molecular-mass fractions in a dio xane solution of cellulose carbanilate, we estimated the length of the Kuhn statistical segment A to be (250 +/- 50) x 10(-8) cm. Calculatio ns based on the dependence of the Kerr constant on the chain length ga ve, for the length of the Kuhn statistical segment of cellulose carban ilate in dioxane solution, the value of (225 +/- 25) x 10(-8) cm. It w as shown that the contribution of the transverse component of the dipo le moment of the monomer unit in electric birefringence is small. The values of longitudinal components of dipole moments of cellulose carba nilate monomer unit in dioxane and ethyl acetate solutions were found to be 0.91 and 1.3 D, respectively. The results obtained suggest that there is a correlation between the orientations of the polar bonds of the polymer chain and orientations of dipole moments of ethyl acetate molecules.