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Statistical analysis of nitrogen‐containing vinyl copolymers: Radiation‐induced copolymerization of vinyl acetate and N ‐vinyl‐2‐pyrrolidone
Author(s) -
Peppas Nikolaos A.,
Gehr Todd W. B.
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.1979.070241008
Subject(s) - copolymer , vinyl acetate , reactivity (psychology) , saponification , polymer chemistry , hydrolysis , chemistry , statistical analysis , nitrogen , materials science , organic chemistry , polymer , mathematics , medicine , statistics , alternative medicine , pathology
Radiation‐induced copolymerization of vinyl acetate and N ‐vinyl‐2‐pyrrolidone was carried out at 5°C using γ‐irradiation of 1450 rads/min. Copolymers prepared at conversions lower than 5% were analyzed by a saponification technique. Various linear and nonlinear statistical analysis techniques were used to determine the reactivity ratios of this system as r 1 = 0.348 and r 2 = 3.108. These data were examined and analyzed in relation to problems of elemental analysis involving nitrogen‐containing copolymers and to discrepancies in the reactivity ratios obtained by previous investigators. The presence of oxygen and a higher dose rate did not affect the copolymer composition within statistical error. Hydrolyzed copolymers prepared by this method have potential applications as biocompatible materials.