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Estimation of the reactivity ratios in the copolymerization of acrylic acid and acrylamide from composition–conversion measurements by an improved nonlinear least‐squares method
Author(s) -
Shawki S. M.,
Hamielec A. E.
Publication year - 1979
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.1979.070231102
Subject(s) - copolymer , reactivity (psychology) , acrylamide , composition (language) , acrylic acid , nonlinear regression , range (aeronautics) , materials science , chemistry , polymer chemistry , mathematics , organic chemistry , regression analysis , polymer , statistics , composite material , medicine , linguistics , philosophy , alternative medicine , pathology
Abstract A new method is developed to estimate the reactivity ratios from composition–conversion data based on nonlinear regression. Previously published experimental data for the copolymerization of acrylic acid and acrylamide are analyzed by the new method and the results compared to those reported by the original investigators. Composition–conversion data were collected for this copolymerization system at intermediate conversion levels and over a limited range of compositions. Values for the reactivity ratios at 40°C were obtained from these data by the new algorithm and compared to the literature values.