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 language | English |
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Pages (from-to) | 7864-7867 |
Number of pages | 4 |
Journal | Macromolecules |
Volume | 44 |
Issue number | 19 |
DOIs | |
Publication status | Published - 11 Oct 2011 |
Externally published | Yes |