Polymer of Dithioether-Linked Phthalonitrile.
Patent, Filed 21 Nov 88, patented 2 Apr 91,
DEPARTMENT OF THE NAVY WASHINGTON DC
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Dithioether-linked phthalonitrile monomer are prepared by a substitution reaction between 4-nitrophthalonitrile and a dimercaptan and are polymerized to a high-temperature, oxidation-resistant polymer by heating them at a temperature above their melting point. The rate of polymerization is increased by the addition of an amine. Electrical conductivity of the polymer can be increased to the conductor range by heating the polymer above about 400 C. This invention relates generally to the synthesis and polymerization of phthalonitrile monomers, and, more particularly to the synthesis, polymerization and pyrolization of dithioether-linked phthalonitrile monomers. Phthalonitrile monomers have two phenyl dinitrile groups connected by a linking group. The linking group in the monomer becomes the linking group in the polymer. The properties of the polymer are determined to a large degree by the linking group. Patents
- Polymer Chemistry