Improved accuracy and precision in the light-scattering characterization of homo- and copolymers in THF

A one-point method was developed for the estimation of weight-averaged molecular weights from light-scattering data. The method is based on the calculation of the second virial coefficient from theoretical predictions of the dependence of A2 on the molecular weight. The second virial coefficient is then regressed for a particular polymer-solvent combination from a series of preexisting measurements over a range of molecular weights. The …