Accession Number:

AD0726471

Title:

Research into the Formation Kinetics of Polypyromellitimide by IR Absorption Spectroscopy,

Descriptive Note:

Corporate Author:

GRUMMAN AEROSPACE CORP BETHPAGE N Y RESEARCH DEPT

Report Date:

1971-07-01

Pagination or Media Count:

20.0

Abstract:

Aromatic polyimides are produced in a two-stage condensation polymerization reaction of the dianhydrides of the aromatic tetracarboxylic acid with the aromatic diamines. The first stage of the reaction is usually carried out in a strongly polar solvent at room temperature and produces a solution of polyamic acid. The second reaction stage, the imidization, consists of a chemical, or thermal, treatment of the polyamic acid that had been precipitated from the solution. In the present work, the kinetics of the thermally induced imidization of a film of polypyromellitanic acid produced from the dianhydride of the pyromellitic acid and a diaminodiphenyl ether were investigated using IR absorption spectroscopy. Author

Subject Categories:

  • Polymer Chemistry
  • Plastics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE