Polyimides.

Abstract

THE MECHANICAL PROPERTIES OF FOUR DIFFERENT POLYIMIDE SAMPLES WERE COMPARED. POLY(N,N'(P.P'-OXYDIPHENYLENE) PYROMELLITIMIDE), SHOWS NO SOFTENING PHENOMENA BELOW 500 C. THE THREE OTHER POLYIMIDES STUDIED SHOW A DEFINITE SOFTENING AT ELEVATED TEMPERATURES. ALL OF THE SAMPLES INVESTIGATED SHOW EVIDENCE OF CHEMICAL REACTION AND EVENTUAL DEGRADATION TAKING PLACE ABOVE 400 C. X-RAY PHOTOGRAPHS SHOW H-FILM TO BE SLIGHTLY CRYSTALLINE. THE OTHER MEMBERS OF THE POLYIMIDE GROUP INVESTIGATED REVEAL A TYPICAL AMORPHOUS SCATTERING PATTERN. FACTORS SUCH AS THE PURITY OF STARTING MATERIALS AND THE PROBLEM OF COMPLETE CONVERSION TO POLYIMIDE LINKAGE MUST BE CONSIDERED WHEN COMPARING THE MECHANICAL PROPERTIES OF THESE VARIOUS POLYIMIDES. (AUTHOR-PL).

Document Details

Document Type
Technical Report
Publication Date
May 01, 1965
Accession Number
ADA952735

Entities

People

  • Arthur V. Tobolsky
  • D. Mair
  • S. I. Cooper

Organizations

  • Princeton University

Tags

DTIC Thesaurus Topics

  • Absorbers (Materials)
  • Advanced Materials
  • Chemical Reactions
  • Conversion
  • Degradation
  • Engineered Materials
  • Materials
  • Mechanical Properties
  • Photographs
  • Photography
  • Scattering
  • Softening
  • X Rays

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Polymer Science and Engineering.