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Photochemically Cross‐linked Poly(aryl ether ketone) Rings
Author(s) -
Teasdale Ian,
Harper Elizabeth C.,
Coppo Paolo,
Wilson Brian,
Turner Michael L.
Publication year - 2006
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200600586
Subject(s) - hydroquinone , ether , polymer chemistry , benzophenone , polymerization , ketone , polymer , aryl , isopropyl , condensation polymer , chemistry , materials science , photochemistry , organic chemistry , alkyl
Summary: Macrocyclic phenyl ether ketones were prepared via pseudo high dilution condensation. Irradiation of these rings with UV light in a solution containing isopropyl alcohol as hydrogen donor resulted in a photo‐induced reduction of benzophenone to benzopinacol and the formation linked macrocycles. These rings can be heated to undergo ring‐opening polymerization and produce a polymer network or they can be added to a polycondensation reaction to prepare poly(ether ether ketones) with variable degrees of cross‐linking.Photochemical cross‐linking of PEK rings and ring opening polymerization ( n : 2–6). (a) h ν , i PrOH, DCM; (b) CsF, 260 °C (polymer 3 ); (c) 4,4′–difluorobenzophenone, hydroquinone, diphenylsulphone, K 2 CO 3 , 260 °C (2% polymer 4 ; 6% polymer 5 ).