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Copolymers of N ‐vinyl‐2‐pyrrolidone and 2‐(dimethylamino)ethyl methacrylate, 2 . Quaternization with octyl bromide — kinetic studies
Author(s) -
Deboudt Karine,
Delporte Michèle,
Loucheux Claude
Publication year - 1995
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1995.021960120
Subject(s) - copolymer , polymer chemistry , chemistry , bromide , vinyl bromide , kinetics , reagent , solvation , steric effects , methacrylate , reaction rate constant , organic chemistry , solvent , polymer , physics , quantum mechanics
N ‐Vinyl‐2‐pyrrolidone — 2‐(dimethylamino)ethyl methacrylate copolymers were quaternized with octyl bromide in tetramethylene sulfone. The quaternization kinetics was studied, varying the concentrations of reagents and the composition of copolymers. The initial rate constant is not disturbed by the concentration of reagents, but it is by the initial copolymer composition: the higher the initial octyl bromide concentration, the higher the maximal conversion rate. These kinetic results were interpreted, observing the influence of the steric effect, the electrostatic effect and the effect of solvation. The kinetic models proposed in the literature were applied to our data and discussed. None of them describes perfectly the behaviour of our system.