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Part 1. Qualitative comparison between polymer and monomer model compound sulfonation
Author(s) -
Daoust D,
Devaux J,
Godard P
Publication year - 2001
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.720
Subject(s) - peek , ether , polymer chemistry , sulfuric acid , fluorine , monomer , sulfonic acid , ketone , polymer , materials science , steric effects , polar effect , chemistry , organic chemistry
The sulfonation kinetics of fluorine ended poly(ether ether ketone) (PEEK) in solution in 95.9% and 96.8% concentrated sulfuric acid was studied with the help of a model compound representative of the PEEK chain repeat unit. The reaction rate of the model compound sulfonation was found to be first order with respect to the aromatic ring to be sulfonated. Consequently, PEEK kinetic data were treated following a first order with respect to the unsulfonated repeat unit concentration. Two rate‐slowing effects were detected. They were attributed to ‘long range’ electronic effects resulting from the inductive nature of the fluorine atom, and from the electron‐withdrawing character of the grafted sulfonic acid group. © 2001 Society of Chemical Industry