33—The Degree of Polymerization and its Distribution in Cellulose Rayons
- 1 July 1955
- journal article
- research article
- Published by Taylor & Francis in Journal of the Textile Institute Transactions
- Vol. 46 (7) , T472-T482
- https://doi.org/10.1080/19447027.1955.10750334
Abstract
The viscosities of n-butyl acetate solutions of a cellulose nitrate fraction of degree of polymerization about 1700 and of a nitrated Taw cotton have been measured at several mean heads above and below those operating in a conventional capillary viscometer. Intrinsic viscosities have been calculated from relative viscosities as they were measured at constant mean head, from relative viscosities interpolated at constant mean rate of flow, and from relative viscosities extrapolated to zero head or zero rate of flow. The intrinsic viscosities were deduced from the equation log(ηr—1)/C=log i+kC. where ηr is the relative viscosity. C the concentration, and k is a constant.Keywords
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