DEPENDENCE OF THE COEFFICIENTS OF THE STO CKMAYER-FIXMAN EQUATION ON THE MOLECULAR-MASS OF POLYMER AND THE THERMODYNAMIC QUALITY OF SOLVENT

Formulas describing a correlation between the coefficients of the Stoc kmayer-Fixman equation and the parameters of the Mark-Kuhn-Houwink equ ation are obtained by the least-squares procedure. These relations are analyzed assuming a the nonlinear-logarithmic dependence of the intri nsic viscosity of flexible polymers in good solvents on their molecula r mass. The character of dependence of the coefficients in the Stockma yer-Fixman equation on the molecular mass of polymer and the thermodyn amic quality of solvent is established. The effect of the conditions o f viscometric measurements on the reliability of evaluation of the unp erturbed dimensions of a macromolecule is studied. An expression for c alculation of the parameter K-theta from the viscometric data for a go od solvent is derived.