Physical Properties of Chlorotrifluoroethylene Polymers as a Function of Molecular Weight. 2. Molecular Fractionation, Density, Viscosity, Molecular Weight and the Correlation of These Properties of Chlorotrifluoroethylene Polymer

摘要

A number of randomly selected samples from different lots of chlorotrifluoroethylene polymer were separated by the use of falling-film type molecular stills into fractions with molecular weights ranging from approximately 400 to 1300. Family trees of each sample, showing its physical properties, are presented. The densities, viscosities, and molecular weights of the various fractions were determined with a high degree of accuracy. These data are presented and are correlated graphically. Empirical equations were derived which accurately express the relationships between density and molecular weight, viscosity and molecular weight, and viscosity and density of the respective fractions. The deviations of the calculated from the observed values for a number of randomly selected fractions are shown in tables. (ERA citation 11:007593)