C. Tsitsilianis et Ep. Bokaris, ENTHALPY RELAXATION STUDIES IN ISOTACTIC POLYSTYRENE - EFFECTS OF CRYSTALLINITY, Polymer bulletin, 30(5), 1993, pp. 609-616
The enthalpy relaxation of the amorphus isotactic polystyrene is stron
gly affected from the crystalline phase induced by annealing at temper
atures between Tg and Tm. All the parameters describing the relaxation
process, DELTADELTAH, Tmax and Tons depend also on the above Tg annea
ling conditions as the induced crystallinity alters the quantity and t
he quality (i.e.Tg,Tgons,DELTATg) of the remaining amorphous phase.