DIELECTRIC BEHAVIOR OF AQUEOUS-SOLUTIONS OF ALPHA,BETA-POLY(ASPARTYL HYDRAZIDE) AND ALPHA,BETA-POLY(N-HYDROXYETHYL ASPARTAMIDE) - AN INVESTIGATION OF THE STRUCTURAL AND DYNAMIC PROPERTIES

The dielectric properties of aqueous solutions of alpha,beta-poly(aspartyl hydrazide) (PAHy) and of alpha,beta-poly(N-hydroxyethyl aspartamide) (PHEA) were measured at 25 degrees C in the frequency range of 100 MHz to 15 GHz using a time domain reflection method (TDR). Single time relaxation processes were found at 2 GHz and 15 GHz, respectively. The low frequency dispersion was interpreted in terms of the dynamics of polymeric segments based on the dielectric relaxation strength and the relaxation time. The high frequency process which is attributed to the rotational relaxation of water, indicated that water molecules surrounding the polymeric backbone and in the pure state have a similar rotational behavior.