Polystyrene in N-Methylpyrrolidone: Intrinsic Viscosity-Molar Weight Relations and Polystyrene Unperturbed Dimensions

Intrinsic viscosity-molar weight relations are reported for polystyrene in N-methylpyrrolidine (NMP) and NMP/LiBr solutions at 30, 45, 60, 75, 90 and 105 °C. Also, Mark-Houwink constants KΘ and the unperturbed dimensions of the polystyrene chains at these temperatures are calculated by applying Stockmayer-Fixman extrapolations of the viscosity/molar weight data. The use of in-line size exclusion chromatography and viscometry is shown to be a facile and accurate method for such studies.