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Determination of intrinsic viscosity from one‐point measurements
Author(s) -
Maron Samuel H.
Publication year - 1961
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.1961.070051505
Subject(s) - intrinsic viscosity , polymer , viscosity , thermodynamics , solvent , homogeneous , materials science , relative viscosity , reduced viscosity , analytical chemistry (journal) , chemistry , chromatography , physics , organic chemistry , composite material
A method is described by means of which reliable intrinsic viscosities, [η], can be obtained for a polymer–solvent system from viscosities determined at only one concentration. The method involves, first, the preparation for one sample of the polymer of an η sp / C and ln η r / C vs. C plot. The ratio of the slopes of these two curves yields then a parameter γ which is independent of molecular weight, and which allows single point [η] determinations on samples of the polymer at any other molecular weight, whether homogeneous or not. Results are presented to show that the method described yields [η]'s in good agreement with those obtained in the usual manner from multipoint viscosity measurements.