Direct iminization of PEEK

Ioannis Manolakis, Paul Cross, Howard M. Colquhoun

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

A study was conducted to demonstrate the process of direct iminization of poly(ether ketone)s (PEK). A sample of PEEK powder was placed in a reaction tube equipped with a nitrogen inlet and mechanical stirrer, together with diphenyl sulfone and 2,2-diphenylethylamine. The system was stirred under a gentle, continuous purge of dry nitrogen and heated slowly to 315 °C to dissolve the polymer. The temperature was then lowered to 270 °C, and the solution was stirred at this temperature for 3 hours, giving a clear, viscous, bright yellow solution. The resulting beige solid was dissolved in dichloromethane and the polymer was recovered as a pale yellow powder by precipitation in methanol. Semicrystalline aromatic PEEK and PEK were found to react cleanly with the high-boiling aralkylamines 2,2-diphenylethylamine and 3,3-diphenylpropylamine in diphenyl sulfone solution at 270 °C affording poly(ether imine)s 1, 2, 3, and 4.

Original languageEnglish
Pages (from-to)7864-7867
Number of pages4
JournalMacromolecules
Volume44
Issue number19
DOIs
Publication statusPublished - 11 Oct 2011
Externally publishedYes

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