Determination of viscosity average molar masses of polyethylene in a wide range using rheological measurements with a harmless solvent

Rheological measurements of polyethylene solutions in a novel nontoxic solvent were used to determine the Mark-Houwink parameters for PE widely different molecular weights assess viscosity average molar mass several millions g.mol−1. Solutions high density that had been previously characterized by size exclusion chromatography prepared harmless naphthenic oil. The intrinsic viscosities obtained varying concentrations calibration samples using rotational rheometer equipped with Couette cell. determined both Huggins and Kraemer descriptions variations concentration. Subsequently, curve versus was plotted, Mark-Houwink-Sakurada equation Using this newly estimated parameters, commercial ultra measuring their respective viscosities. Finally, method has validated comparing these results values standard viscosimetry 1,2,4-trichlorobenzene given supplier, other methods.