Molecular weight and solution viscosity characterization of PVC

As a means of developing the most accurate possible Mark-Houwink relationship possible for PVC, the literature Mark-Houwink coefficients for the weight average molecular weight (MW) of PVC in THF are plotted and the derived 'grand average' Mark-Houwink relationship (K = 15.56 × 10-3 ml/g, a = 0.7690) is shown. High pressure-size exclusion chromatography (HP-SEC) data from two independent laboratories was used along with the 'grand average' Mark-HouwinK coefficients to calculate absolute number of average molecular weight (MN) and weight average molecular weight values for PVC. An easy-to-use table has been developed to detail the relationships between Mn, MW, K value, and inherent viscosity (I.V.).