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Synthesis and properties of new crystalline poly(arylene ether)s containing pendant benzoyl groups

✍ Scribed by Keiji Konno; Nobuo Deguchi; Koichiro Yonetake; Mitsuru Ueda; Patrick E. Cassidy; John W. Fitch

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 181 KB
Volume: 35
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(199703)35:4<605::aid-pola2>3.0.co;2-o

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✦ Synopsis

Poly(arylene ether)s ( 3) containing pendant benzoyl groups were prepared by the aromatic substitution reaction of 2,5-difluoro-4-benzoylbenzophenone ( 2) with hydroquinone (1a) and methylhydroquinone (1b) in the presence of potassium carbonate in N,N-dimethylacetamide. The polycondensation proceeded smoothly at 165ЊC and produced poly(arylene ether)s with inherent viscosities up to 0.8 dL/g. The polymer (3b) derived from methylhydroquinone was quite soluble in common organic solvents and could be processed into uniform films from solutions. On the other hand, the polymer (3a) derived from hydroquinone was only soluble in pentafluorophenol and methanesulfonic acid and had a high crystallinity. These polymers showed 10% weight losses at around 420 and 490ЊC in nitrogen. Polymer 3b also showed good tensile strength and tensile moduli.

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