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Synthesis and characterization of phthalazinone‐based poly(aryl ether ketone) derived from 4,4′‐dichlorobenzophenone
Author(s) -
Zhou Hongxin,
Liu Cheng,
Wang Jinyan,
Jian Xigao
Publication year - 2012
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1950
Subject(s) - glass transition , ketone , ether , polymer , differential scanning calorimetry , materials science , polymer chemistry , thermal stability , aryl , sulfolane , thermogravimetric analysis , fourier transform infrared spectroscopy , solubility , solvent , chloroform , organic chemistry , chemical engineering , chemistry , composite material , physics , alkyl , engineering , thermodynamics
As distinguished from the conventional preparation of poly(aryl ether ketone)s utilizing 4,4′‐difluorobenzophenone, a novel synthetic method of high molecular weight poly(phthalazinone ether ketone) derived from 4,4′‐dichlorobenzophenone was studied. Reaction conditions to get high molecular weight polymer were investigated in details. Experimentally, sulfolane was chosen as the reaction media and high molecular weight polymer could be obtained in 7–8 hr at 210°C. The cyclic oligomers in the polymer product reduced to below 3.0% when the concentration of the reactant is 1.6–1.7 g/ml. Fourier transform infrared (FT‐IR), 1 H NMR, and elemental analysis were used to confirm the structure of the obtained polymer. The amorphous polymer showed reasonable solubility in selective solvent, such as chloroform and N ‐methyl‐2‐pyrrolidone, and tough, flexible, and transparent thin film can be readily prepared from their N ‐methyl‐2‐pyrrolidone solution. The obtained polymer showed high glass transition temperature ( T g ) up to 261°C detected by differential scanning calorimetry (DSC), and the temperature of 5% weight loss under nitrogen higher than 500°C detected by thermal gravimetric analysis (TGA), indicating its excellent thermal stability. Copyright © 2011 John Wiley & Sons, Ltd.