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Poly(ether ketone)s with cyclohexyl‐substituted indan groups in the main chain
Author(s) -
Maier Gerhard,
Wolf Martin
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.1997.021980806
Subject(s) - polymer chemistry , ketone , chemistry , ether , differential scanning calorimetry , monomer , glass transition , tetrahydrofuran , cyclohexane , polystyrene , chloroform , polymer , gel permeation chromatography , organic chemistry , solvent , physics , thermodynamics
Poly(ether ketone)s containing 1,3‐dicyclohexyl‐1‐methyl‐3‐phenylindan groups in the main chain were prepared from different bisphenols and a bisfluoride monomer which contains the indan group. The bisfluoride monomer was synthesized in a three‐step process, starting from cyclohexyl phenyl ketone. All polymers are soluble in tetrahydrofuran, chloroform and N , N ‐dimethylpropyleneurea. No melt transitions were detected by differential scanning calorimetry. Glass transition temperatures are relatively high (218°C to 255°C). In gel‐permeation chromatography with polystyrene calibration, 8400 < M̄ n < 17900 and 34500 < M̄ w < 76600 were found. The thermooxidative stability of these polymers is fairly low with decomposition starting at 400°C in air. This was attributed to the methine group of the cyclohexyl ring since the major decomposition products proved to be cyclohexane and cyclohexene.