Investigation of the Tll (>Tg) transition in polystyrene by torsional braid analysis

Investigation of the Tll (>Tg) transition in amorphous poly-styrene by the technique of torsional braid analysis is reviewed. For the most part, the relaxation behaves like the glass transition (Tg) in its dependence on molecular weight, on average molecular weight in binary polystyrene blends, and on composition in a compatible plasticized system.