Abstract
DURING recent years a good deal of attention has been given to the investigation of the molecular weight of native cellulose, but the results are highly discordant, the values most frequently quoted being those of Mark1 (about 30,000, on the basis of micell length by X-ray analysis and other data), Stamm2 (40,000, by sedimentation equilibrium in the ultra-centrifuge) and Staudinger3 (about 120,000 by extrapolation of viscosity vs. molecular weight data). The sedimentation equilibrium method is the soundest theoretically, and we have recently demonstrated experimentally4 that it gives correct molecular weight values for long-chain molecules which, like cellulose, give highly viscous solutions.
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References
H. Mark, Trans. Faraday Soc., 29, 41; 1933.
A. J. Stamm, J. Amer. Chem. Soc., 52, 3047; 1930.
H. Staudinger, Trans. Faraday Soc., 29, 18; 1933.
J. Amer. Chem. Soc., 55, 4319; 1933.
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KRAEMER, E., LANSING, W. Molecular Weights of Celluloses. Nature 133, 870–871 (1934). https://doi.org/10.1038/133870c0
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DOI: https://doi.org/10.1038/133870c0
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