Dynamic mechanical behavior of polysulfones

Abstract

Polysulfones made from a wide range of bisphenols which include 0, 1, 2, or 3 methyl groups per phenyl ring and a wide range of groups connecting the phenyl rings in the bisphenol while the diphenyl sulfone unit was not changed are studied. The symmetry and placement of these modifications and the resulting rigidity affect the T g and the sub-T g spectra. Both intramolecular and intermolecular factors contribute to these changes. The T g range from 150 to 298°C and the sub-T g relaxation temperatures from -100 to +200°C. Substitutions that directly hinder phenylene mobility increase the temperature at which the γ relaxation occurs