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Correlating mooney viscosity to average molecular weight
Author(s) -
Kramer O.,
Good W. R.
Publication year - 1972
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.1972.070161020
Subject(s) - molar mass distribution , viscosity , gel permeation chromatography , logarithm , molecular mass , intrinsic viscosity , polymer , chemistry , mooney viscosity , copolymer , thermodynamics , materials science , mathematics , organic chemistry , physics , mathematical analysis , enzyme
Copolymers of styrene and butadiene of the same chemical conposition, but widely different molecular weight distributions, were characterized by gel permeation chromatography. A very good correlation was obtained between the logarithm of the Mooney viscosity and the logarithm of the geometric mean of the number‐ and weight‐average molecular weights. Instead of this molecular weight average, one can equally well use the very convenient “Av log M ,” which is a weight‐average molecular weight, using a logarithmic molecular weight scale. This correlation makes it possible to predict the Mooney viscosity from GPC data with a precision of about 15% (± one standard deviation), independent of the molecular weight distribution of the polymer. The obtained correlation was much better than with either weight‐average molecular weight or viscosity‐average molecular weight with α = 0.67.