Inorganic Cyanophosphine Rubbers
[Technical Report, Memorandum Report]
NAVAL RESEARCH LAB WASHINGTON DC
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The objective of this Karles Fellowship was to develop polymers stable to 400-500 deg C by utilizing cyanophosphine monomers with stable, aromatic substituents. New methods have been developed to deposit thin films of thermooxidatively robust polymerized PCN3 that act as hard thermosets. A new method for synthesizing monocyano- and dicyanophosphines of similar structure was developed, and several of these monomers were investigated for their ability to produce robust thermosets. Phenyl dicyanophosphine PhPCN2 thermosets into a hard, thermooxidatively stable, monolithic material. The novel monomer bisdiphenylaminocyanophosphine Ph2N2PCN thermosets in a promising, waxy, black solid, but exhibits poor thermal stability due to non-oxidative intramolecular elimination reactions.
- Inorganic Chemistry