Monomer bisphthalonitriles

Bisphthalonitrile monomers were cured neat, with nucleophilic and redox co-reactants, or in combination with a reactive diluent. Dynamic mechanical measurements on the resulting polymers from -150 to +300°C turn up several differences attributable to differences in network structure. Rheovibron results were supplemented with solvent extraction, differential scanning calorimetry (DSC), vapor pressure osmometry, and infrared spectroscopy to characterize the state of cure. 

Ether-linked bisphthalonitriles were synthesized by Mr. T. R. Price of the Naval Research Lab. A number of monomers containing various aliphatic and aromatic "linking groups" between the phthalonitrile functions are available three representative aromatic monomers were selected for this study... 

Melt polymerizable bisimido-bisphthalonitrile polymer precursors were synthesized by the reaction of 4-aminophthalonitrile (4-APN) with 6FDA. The synthesized monomer showed a melting point at about 270 °C, which upon melt polymerization gave thermally - stable tough polymers. [84]. 6FDA based Pis can be prepared via one-step synthesis using gamma radiation fi om a cobalt-60 source [85]. 

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