Osmometric molecular weight measurements

The authors acknowledge gratefully the contributions of J. G. Cobler and Miss C. Kleeman for the ultracentrifuge particle size measurements, E. B. Bradford for the electron microscope particle size measurements. Miss D. L. Dickens, A. S. Teot, and N. Sarkar for the critical coagulation concentration experiments, R. D. Van Dell for the SDS adsorption experiments, the East Main Analytical Laboratory for the osmometric molecular weight and nitrogen adsorption measurements, the Chemical Physics Laboratory for the X-ray fluorescence measurements, and J. B. Shaffer in the preparation of the latexes. 

Optically active propylene oxide was polymerized by potassium hydroxide as a catalyst and the polymer of an osmometric molecular weight of 3200 was obtained [5]. Optical rotation of the polymer was measured in 35 different solvents at ambient temperature at a fixed concentration of 2.5 g/100 ml. 

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