MOLECULAR-WEIGHT AND TEMPERATURE-DEPENDENCE OF INTRINSIC-VISCOSITY OF POLYMER-SOLUTIONS

The molecular weight and temperature dependence of the intrinsic viscosity of polymer solutions have been predicted by combining the calculated radius of gyration, RG, and hydrodynamic radius, RH, with either the static empirical approach of Mandelkern-Flory or the dynamic argument of Weill-des Cloizeaux. It is found that experimental results can be successfully represented by the dynamic model for a range of five decades of molecular weight and temperature. The discrepancy between the calculated and experimental data at N {reversed tilde equals} Nt{cyrillic} reveals the crudeness of the discontinuity at the temperature cut-off assumed by current temperature blob theory. © 1979.