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(aspa rtyl hydrazide) (PAHy) and of alpha,beta-poly(N-hydroxyethyl aspartami de) (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 tim e relaxation processes were found at 2 GHz and 15 GHz, respectively. T he low frequency dispersion was interpreted in terms of the dynamics o f polymeric segments based on the dielectric relaxation strength and t he relaxation time. The high frequency process which is attributed to the rotational relaxation of water, indicated that water molecules sur rounding the polymeric backbone and in the pure state have a similar r otational behavior.