Rheologica Acta, Vol.36, No.2, 187-196, 1997
Stability of the T-infinity FT
Dynamic shear measurements in the frequency range from 10(-4) to 500 rad/s at the flow and main transition of a polydisperse poly(vinyl acetate) and a monodisperse polystyrene sample are presented. For both samples the Vogel temperature of the flow transition T-infinity FT is Smaller than the Vogel temperature of the main transition T-infinity alpha independent of the criteria used for data evaluation. The difference between the two Vogel temperatures corresponds to results for samples with other molecular weight and polydispersity from the Literature. The T-infinity FT