Premium
The behavior of polypyromellitimide resins at high temperatures
Author(s) -
Scala L. C.,
Hickam W. M.
Publication year - 1965
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1965.070090123
Subject(s) - polymer , materials science , thermal stability , degradation (telecommunications) , polyamide , polymer chemistry , oxygen , composite material , atmospheric oxygen , chemical engineering , chemistry , organic chemistry , telecommunications , computer science , engineering
Aromatic polyamides and polyimides of high molecular weight are currently under development by many industrial laboratories. Wire enamels, laminating and impregnating resins, and varnishes incorporating this new class of thermally stable polymers withstand higher operational temperatures than do most organic polymeric materials in use today. The thermal and oxidative stability of two of these resins has been investigated in air, in oxygen, and in O 18 ‐enriched oxygen over a temperature range of 300–400°C. The mechanism of degradation is postulated to be that of a unit by unit destruction of the polymer.