Abstract
An experimental study using dielectric spectroscopy measurements is made on molecular motions as function of temperature and frequency of polyurethane biocomposites, based on poly(ester urethane) and extracellular matrix components (hydrolyzed collagen, elastin, hyaluronic acid, chondroitin sulfate). Relaxation parameters were evaluated from isothermal dielectric spectra in -1004+-30 degrees C temperature interval by applying empirical Havriliak-Negami function Relaxation times versus temperature were analysed for glass transition and secondary transitions by means of Arrhenius law and Vogel-Fulcher-Tammann-Hesse equation.