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Synthesis and characterization of new aromatic poly(ether ketone)s
Author(s) -
Mercer Frank W.,
McKenzie Martin T.,
Merlino Gloria,
Fone Matilda M.
Publication year - 1995
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1995.070561103
Subject(s) - pyridazine , imide , polymer chemistry , ether , ketone , amide , chemistry , condensation polymer , thermal stability , monomer , nitrile , terephthaloyl chloride , organic chemistry , polymer
Abstract A general method for the preparation of aromatic poly(ether ketone)s containing amide, amide‐imide, cyano, oxadiazole, and pyridazine moieties has been developed. Polymerization is based on a ketone‐activated halide displacement from amide‐, amide‐, imide‐, cyano‐, oxadiazole‐, or pyridazine‐containing bis(4‐fluorobenzoyl) moieties by bisphenoxides in a polar aprotic solvent. The bis(4‐fluorobenzoyl) moieties were prepared by reaction of 4‐fluorobenzoyl chloride with diphenoxy monomers containing amide, amide‐imide, cyano, oxadiazole, or pyridazine groups under modified Friedel–Crafts conditions in methylene chloride. All of the polyether ketones prepared were amorphous and exhibited T g s ranging from 134 to 218°C. In addition, films of the aromatic polyether ketones displayed good thermal stability and flexibility. The dielectric constants of the films were characterized as a function of relative humidity (RH). © 1995 John Wiley & Sons, Inc.