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Issue 3, 2001
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The poly(Friedel–Crafts) reaction between benzene-1,2,4,5-tetracarboxylic dianhydride and diphenyl ether gave carboxylic acid functional polyarylates (PEKK-COOH) that were soluble in polar solvents such as NMP and DMF. The carboxylic acid functional polymers were thermally stable up to 400 °C. PEKK-COOHs in DMF or NMP solution, dispersed in paraffin oil, were cross-linked by reaction of the pendant carboxylic groups with bisphenol-A diglycidyl ether. Insoluble networks were formed by reaction of between 45 and 95 mol% of the carboxylic acid groups. Although regular particles were formed initially, upon drying they formed irregular particulate aggregates that could not be redispersed back to the primary particles. The networks showed a degradative weight loss around 150 °C, which was caused by dehydration from the 2-hydroxypropyloxy group. Further curing of the particles at 160 °C produced a material which did not show any obvious differences in colour or form from the non-heated particles.

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Article information

30 Aug 2000
01 Dec 2000
First published
23 Jan 2001

J. Mater. Chem., 2001,11, 736-740
Article type

Suspension cross-linking of poly(aryl ether ketone)s containing carboxylic acid functionality

R. A. Hunter, P. D. Turner and S. Rimmer, J. Mater. Chem., 2001, 11, 736
DOI: 10.1039/B007052L

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