Relationship between the intrinsic viscosity and eyring-NRTL viscosity model parameters

A multicomponent liquid mixture viscosity model based on the Eyring and nonrandom two-liquid (NRTL) theories was recently presented and evaluated over the entire concentration range using data from several polymer-solvent systems. This paper defines the mathematical relationship between the intrinsic viscosity and Eyring-NRTL viscosity model parameters. The mathematical relationship allows the extrapolation of viscosity data, over a wide range of concentrations, to the dilute solution intrinsic viscosity. For illustration purposes, intrinsic viscosities for several branched polyolefin-solvent systems were calculated from Eyring-NRTL parameters and compared to literature intrinsic viscosities for fractionated polyisobutylenes and oligomers over a M-n range of 224-1 500 000.