The structural 'memory' of amorphous polystyrene

Data on the temperature dependence of effective viscosity, specific volume, compressibility and thermal conductivity of the melt, kinetics of enthalpy relaxation in the glass transition range and heats of solution of amorphous polystyrene (PS) samples with various prehistories have been analyzed. It was conducted the incomplete restoration of the initial tangled network in a sample prepared from good solvents is perhaps due to the appearance of a fraction of rheologically less active entanglements.