Mechanism and kinetics of poly(ether ether ketone) (PEEK) sulfonation in concentrated sulfuric acid at room temperature. Part 3. General kinetic model of the sulfonation of PEEK fluoroarylketone chain-end repeat unit

被引:10
作者
Daoust, D [1 ]
Devaux, J [1 ]
Godard, P [1 ]
机构
[1] Univ Catholique Louvain, Unite Phys & Chim Hauts Polymeres, B-1348 Louvain, Belgium
关键词
poly(ether ether ketone); PEEK; sulfonation; kinetics; NMR;
D O I
10.1002/pi.719
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The sulfonation kinetics of the fluoroarylketone chain-end repeat unit of PEEK was studied. To achieve this objective, the sulfonation reactions of a trimer, a tetramer and a polymer, each fluoroarylketone ended, were followed by F-19 NMR. A general kinetic model was developed to determine the kinetic constants from F-19 NMR data. The reliability of the kinetic model and of its mathematical expression was ensured. The kinetic constants are then calculated and discussed. In particular, they were compared with the dimer rate constants previously determined. Lastly and as a conclusion of this work, a general kinetic model describing the sulfonation of main chain repeat units of PEEK is proposed. (C) 2001 Society of Chemical Industry.
引用
收藏
页码:932 / 936
页数:5
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