Aromatic homopolymers obtained by precipitation polycondensation: 1. Synthesis of naphthalene-containing polyketones

• Published in: Polymer (Guilford) Vol. 36; no. 18; pp. 3575 - 3583
• Main Authors: Zolotukhin, M.G., Dosière, M., Fougnies, C., Villers, D., Gileva, N.G., Fatykhov, A.A.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 1995
• Subjects: poly(aryl ether ketone)s; precipitation polycondensation; synthesis; synthesis; poly(aryl ether ketone)s; precipitation polycondensation
• ISSN: 0032-3861; 1873-2291
• DOI: 10.1016/0032-3861(95)92030-I

High molecular weight film-forming semicrystalline aromatic polyketones with a regular structure were obtained by precipitation electrophilic Friedel-Crafts polycondensation of 2,6-naphthalenedicarboxylic acid chloride with diphenyl ether, 1,4-bis(
p-phenoxy) benzophenone and 1,4-bis(
p-phenoxybenzoyl) benzene. Using
1H and
13C n.m.r. spectroscopy, the polyketones obtained were shown to be linear with
para-substituted arylene fragments in the main chain. These polymers are soluble in strong protic acids and in common organic solvents, such as dichloroacetic acid and CHCl
3/CF
3CO
2H mixtures. Depending on the chemical structure, these ‘as-made’ polyketones were found to show multiple melting behaviour on heating.