Polyelectrolytes. VII. Viscosities of derivatives of poly‐2‐vinylpridine

Abstract

Abstract Polyelectrolytes were prepared by partial quaternization of poly‐2‐vinylpyridine ( M = 45,000) with methyl bromide and butyl bromide. Viscosities of the former salt were measured in water and methanol; of the latter in water, methanol, ethanol and nitrobenzene. A new method of calibrating viscometers is described. Shear constants of the salts in aqueous solution were determined. The viscosity data conform to the equation: Correlations between both structure of salt and dielectric constant of solvent, and the constants of the equation were found. Quaternary derivatives of poly‐2‐vinylpyridine are more rodlike than corresponding derivatives of poly‐4‐vinylpyridine.