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Determination of intrinsic viscosity from one point measurement
Author(s) -
Pechoč Vladimír
Publication year - 1964
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1964.070080318
Subject(s) - viscosity , intrinsic viscosity , thermodynamics , relative viscosity , reduced viscosity , range (aeronautics) , materials science , constant (computer programming) , inherent viscosity , chemistry , physics , composite material , polymer , computer science , programming language
The method of calculation of the intrinsic viscosity [η] from one viscosity measurement according to the Solomon and Ciutǎ's equation\documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{l} [\eta ]c = \sqrt 2 \sqrt {\eta _{sp} - \ln \eta _r } \\ \\ \end{array} $$\end{document} has been analysed. The difference between [η] extrapolated from the measurement of viscosity at several concentrations and [η] calculated has been defined in dependence on the product [η] c and the value of Huggins' constant k' . It has been demonstrated that the proposed equation is often useful but not generally valid; the range of its applicability has been defined.