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- W2037885722 abstract "Some novel macrocylic(arylene ether ketone)oligomers were synthesized in high yields by a nucleophilic aromatic substitution reaction of 4,4′-dinitrobenzophenone with bisphenols in the presence of anhydrous potassium carbonate under pseudo-high-dilution conditions. Detailed structural characterization of these oligomers by matrix-assisted laser desorption/ionization-time of fiight-mass spectrometry (MALDI-TOF-MS), 1H NMR and FT-IR confirmed their cyclic nature and the compositions of the oligomeric mixtures was indicated by GPC analysis. Ring-opening polymerization of cyclic oligomers 3a to a high molecular weight polymer with Mw of 52.3 and Mn of 17.2 k was achieved by heating at 280°C for 40 min in the presence of a nucleophilic initiator." @default.
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- W2037885722 date "1998-04-01" @default.
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- W2037885722 title "Macrocyclic Oligomeric Arylene Ether Ketones: Synthesis and Polymerization" @default.
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- W2037885722 doi "https://doi.org/10.1295/polymj.30.300" @default.
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