Accession Number:

AD1159275

Title:

Inorganic Cyanophosphine Rubbers

Descriptive Note:

[Technical Report, Memorandum Report]

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

Report Date:

2022-02-08

Pagination or Media Count:

40

Abstract:

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.

Descriptors:

Subject Categories:

  • Inorganic Chemistry

Distribution Statement:

[A, Approved For Public Release]