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Aromatic polymers obtained by precipitation polycondensation, 2 . Synthesis of poly(ether ketone ether ketone ketone) (PEKEKK)
Author(s) -
Zolotukhin Mikhail G.,
Rueda Daniel R.,
Calleja Francisco J. Baltá,
Bruix Marta,
Cagiao Maria E.,
Bulai Anna,
Gileva Natalia G.
Publication year - 1997
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1997.021980416
Subject(s) - terephthaloyl chloride , ketone , ether , condensation polymer , polymer chemistry , monomer , chemistry , inherent viscosity , polymer , aryl , organic chemistry , intrinsic viscosity , alkyl
A high molecular weight, linear aromatic poly(ether ketone ether ketone ketone) (PEKEKK) has been synthesized by electrophilic Friedel‐Crafts acylation condensation of 1,4‐diphenoxybenzophenone with terephthaloyl chloride. The syntheses were performed as precipitation polycondensations, and the polyketones were obtained in particle form. The viscosity (molecular weight), shape and size of these particles were found to be strongly dependent on the reaction conditions. For low monomer concentration, highly ordered needle‐like particles were also obtained. The chemical structure of the polymers obtained was confirmed by 1 H and 13 C NMR spectroscopy, and para ‐substitution in aryl fragments of the main chain was identified. Analysis of the expanded 1 H NMR spectra for the ring proton resonances reveals defect meta ‐ and ortho ‐structures. The amount and isomer ratio of these defect structures depend on the monomer concentration used.