Molecular weight dependence of intrinsic viscosity for polyarylates at 30°C

ABSTRACT

The intrinsic viscosity of polyarylates having different molecular weights was calculated in O-chlorophenol at 30C. The root-mean-square distance [h 2] 1/2 separating the ends of polyarylates chain was calculated. Analysis of data indicated that the intrinsic viscosity is proportional to the average molecular weight and [h 2] 1/2. The slopes of Stock-Mayer and Fixman plots were used to determine the mutual excluded volume [beta] of segments. The beta-values obtained were compared with the values calculated for the poly[nitroarylates] and were found to be in the order Beta poly[nitroarylates] > > beta[polyarylates]. This was due to the presence of the nitro group and the ether linkage in the backbone of the polyarylates