| Pressure effects on the alpha and alpha' relaxations in polymethylphenylsiloxane (2006) | |||||||||||
Abstract | |||||||||||
| THE JOURNAL CHEMICAL PHYSICS Pressure effects the Kriegsa and relaxations polymethylphenylsiloxane Forschungszentrum lich Institut Festk rperforschung Weiche Materie lich Germany Gapinski Molecular Biophysics Laboratory Institute Physics Adam Mickiewicz University Umultowska Pozna Poland Meier Forschungszentrum lich Institut Festk rperforschung Weiche Materie lich Germany Paluch and Pawlus Institute Physics Silesian University Uniwersytecka Katowice Poland Patkowski Molecular Biophysics Laboratory Institute Physics Adam Mickiewicz University Umultowska Pozna Poland Received October accepted January published online March relaxation observed some polymers addition the usual structural relaxation slower with non Arrhenius temperature dependence order understand better the molecular origin relaxation poly methylphenylsiloxane PMPS have studied for the rst time this the pressure dependence its relaxation time together with the usual temperature dependence means dynamic light scattering DLS For the same material the relaxation was also studied means DLS and dielectric spectroscopy broad temperature and pressure ranges relaxation times all pressures studied can that the temperature dependence both and described double Vogel Fulcher Tammann VFT law The pressure dependence the characteristic temperatures glass transition temperature and Vogel temperature well the activation volumes for both and processes are very similar indicating that both relaxation processes originate from simila | |||||||||||
Publication details | |||||||||||
| |||||||||||