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The thermo‐oxidative stability of fluorinated polyimides and polyimide/graphite composites at 371°C
Author(s) -
Scola Daniel A.,
Wai Martin
Publication year - 1994
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.1994.070520307
Subject(s) - polyimide , graphite , materials science , composite material , polymer , layer (electronics)
Increasing demands to decrease engine weight and improve engine performance has led to an investigation to develop polymer composites capable of being used at 371°C and above in 4 atmospheres of air. The results of an investigation to determine the thermo‐oxidative stability (TOS) of various fluorinated polyimides, 3F‐PDA, 36F‐PDA, Avimid‐N, AFR700B, and other PMR‐type resins and graphite composites containing these polyimides at 371°C in air at 1 and 4 atmospheres are presented. Weight losses due to aging under these conditions are presented as the criteria for measuring the TOS. The data show that 3F‐PDA and Avimid‐N which have equivalent TOS, exhibit twice the TOS than that of AFR700B and other PMR‐type resins. 36F‐PDA exhibits even better TOS than 3F‐PDA or Avimid‐N. © 1994 John Wiley & Sons, Inc.