Preparation of a polyimide foam

Autor:	James S. Rose, William J. Farrissey, Peter S. Carleton
Rok vydání:	1970
Předmět:	Phthalic anhydride Materials science Polymers and Plastics General Chemistry Isocyanate Surfaces Coatings and Films Solvent chemistry.chemical_compound chemistry Polymer chemistry Materials Chemistry Benzophenone Organic chemistry Thermal stability Lewis acids and bases Imide Polyimide
Zdroj:	Journal of Applied Polymer Science. 14:1093-1101
ISSN:	1097-4628 0021-8995
DOI:	10.1002/app.1970.070140419
Popis:	The reaction of phenyl isocyanate with phthalic anhydride to form N-phenylphthalimide is strongly solvent dependent and catalyzed by tertiary amines. Water and alcohol promote imide formation, but Lewis acids and organometallic compounds are ineffective. In DMSO solvent, benzophenone tetracarboxylic dianhydride (BTDA) and polymethylene polyphenol isocyanate (PAPI) polymerize with the evolution of carbon dioxide to yield a foamed polyimide. The solvent-freed open-celled foams exhibit exceptional fire resistance and thermal stability.
Databáze:	OpenAIRE
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