Abstract
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 Mn range of 224−1 500 000.
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