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Osmometry of high polymer solutions. II. Osmotic measurements using bacterial cellulose membranes

1949; Wiley; Volume: 4; Issue: 3 Linguagem: Inglês

10.1002/pol.1949.120040309

1542-6238

C. R. Masson, H. W. Melville,

Membrane Separation and Gas Transport

Abstract Bacterial cellulose membranes have been used successfully to measure the osmotic pressures of a number of high polymer‐solvent systems. The dynamic method of Fuoss and Mead has been used in most cases, but for polyvinylxylene in benzene the rate curves are not symmetrical since the solvent passes through the membrane faster from the solution side. The molecular weight values for two polyvinyl acetates agree well with the calculated kinetic values, and for polyethyl sebacate the value obtained agrees with that found by endgroup titration. Values of the Huggins “constant” μ are given for various systems.