Accession Number : ADD004191

Title :   Phenylethynyl Substituted Aromatic Diamines.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Arnold,Fred E ; Hedberg,Frederick L

Report Date : 26 Jul 1977

Pagination or Media Count : 5

Abstract : The principal processing problem inherent in a substantial number of aromatic and aromatic-heterocyclic systems is the absence of an effective method for curing the systems. High temperatures are necessary because extensive flow is mandatory for curing such resins by interchain chemical reactions. Because of their inherent rigidity, aromatic and aromatic-heterocyclic resins are much more susceptible to mobility dependence than are aliphatic resins. There is a need, threrfore, for an entirely different method of cure which is not dependent upon extensive molecular mobility. Instead of systems that cure by interchain reactions, which require extensive mobility, improved systems are sought that cure by intramolecular reactions which require only rotational movement of the polymer backbone. It is a principal object of this invention, therefore, to provide novel diamino aromatic monomers containing phenylethynyl pendant groups which cyclize and cure intramolecularly after polymerization. (Author)

Descriptors :   *Patents, *Aromatic polycyclic hydrocarbons, *Amines, *Synthesis(Chemistry), Substitution reactions, Phenyl radicals, Monomers, Polymerization, Curing, Molecular structure, Composite structures, Adhesives, Aircraft, Aerospace systems, Matrix materials, Thermal stability, Oxidation resistance

Subject Categories : Organic Chemistry
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE