Accession Number : ADA310108
Title : Preparation and Properties of Imide/Pyrrone Copolymers.
Descriptive Note : Technical note,
Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CEN TER
Personal Author(s) : Bell, Vernon L.
PDF Url : ADA310108
Report Date : NOV 1969
Pagination or Media Count : 26
Abstract : Two series of copolymers containing imidazopyrrolone (Pyrrone) and imide groups were prepared by solution polymerization. The mechanical properties of thin films of the copolymers were measured and the films showed a general increase in the tangent modulus and a decrease in elongation with increasing Pyrrone content. The copolymers were more resistant to degradation by strong acids and bases than the corresponding polyimide. The thermal stabilities of the copolymers in air improved with increasing imide content, while the thermal stabilities in a vacuum improved with increasing Pyrrone content. These copolymers represent a way to utilize the useful properties of each class of homopolymers.
Descriptors : *POLYMERS, *COPOLYMERS, *IMIDES, *IMIDAZOLES, MECHANICAL PROPERTIES, DEGRADATION, RESISTANCE, POLYMERIZATION, THIN FILMS, VACUUM, THERMAL STABILITY, TENTS, ELONGATION, ACIDS, POLYIMIDE RESINS.
Subject Categories : Organic Chemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE