Matthew Laskoski, Dawn D. Dominguez and Teddy M. Keller Synthesis and properties of a bisphenol A based phthalonitrile resin Journal of Polymer Science Part A: Polymer Chemistry 43
A multiple aromatic ether linked phthalonitrile monomer was synthesized, characterized, and converted thermally to a thermosetting polymer. The oligomeric monomer was prepared from the reaction of an excess amount of bisphenol A with 4,4′-difluorobenzophenone in the presence of K2CO3 in an N,N-dimethylformamide/toluene solvent mixture, followed by end capping with 4-nitrophthalonitrile in a two-step, one-pot reaction. Upon curing to a thermoset, the oligomeric phthalonitrile polymer exhibited excellent thermooxidative stability, maintained good structural integrity at elevated temperatures, and showed low water absorption under ambient conditions.
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