The differing glass transitions between deuterated polystyrene and poly(a-methylstyrene) are shown to have a profound effect on their interdiffusion coefficient. We have measured the interdiffusion coefficient as a function of concentration and temperature for two blends. The results can be interpreted in terms of the 'fast’ theory of interdiffusion with the temperature dependence obtained from a Williams–Landel– Ferry (WLF) treatment. The intradiffusion coefficients of the two polymers have also been deduced by this analysis. It is found that the deuterated polystyrene has a much more concentration-dependent intradiffusion coefficient than the poly(a-methylstyrene). Thermodynamic slowing down is also observed in one blend.
Посилання на статтю:
Interdiffusion in blends of deuterated polystyrene and poly(a-methylstyrene) / Mark Geoghegan, Richard A.L. Jonesa, Maurits G.D. van der Grintenb, Anthony S. Clough // Polymer. – 1999. – N 40. – P. 2323–2329.