Kinetic and Rheological Studies of a Model In-Situ Molecular Composite System (PAA/DNI-3A)

Abstract

A model compound of In- Situ Molecular Composite system, poly(amic dialkylamide) was prepared and characterized in an attempt to better understand the rod conversion for designing a processing scheme for these materials. The conversion kinetics and the chemorheology of the system were studied by using FTIR and TICA. The activation energy was found to be higher than the values reported for poly(amic esters). The rod conversion kinetics was controlled by rheology. Two different kinetic rates were observed before and after the vitrification point. A Fixed-Time-Interval method for using FTIR data to analyze kinetic rate was developed. The effect of pressurization on the thermal behavior of the model system was analyzed. This study clearly indicated that the rod conversion chemistry is rheologically controlled.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1991
Accession Number
ADA232740

Entities

People

  • Charles Y. Lee
  • Yih-fang Chen

Organizations

  • Wright Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Absorption Spectra
  • Air Force
  • Artificial Intelligence
  • Chemical Kinetics
  • Chemical Reaction Properties
  • Chemical Reactions
  • Chemistry
  • Composite Materials
  • Energy
  • Heat Of Activation
  • Kinetics
  • Materials
  • Materials Laboratories
  • Materials Science
  • Plastic Explosives
  • Rheology
  • Time Intervals

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Polymer Science and Engineering.
  • Thin Film Deposition Science.