Condensation Polymers with Controlled Structure.

Abstract

Wholly aromatic amides (aramides) represent a class of polymers of exceptional technological importance. Fibers with high mechanical strength and thermal resistance, obtained from nematic solutions of these polymers, are at present employed in a variety of industrial applications requiring extraordinary performances. As stated in our last report, this project's objective is to investigate the effects of constitutional isomerism in aramides arising when non-symmetric substituents are introduced into the main chain. We tried to solve the problem of determination of the polymers' structural regularity in two independent ways. On one hand, we calculated expected values for the order parameter s for all the compounds we synthesized applying the theory constitutional isomerism. On the other hand we tried to determine the structural order of our polymers directly through nuclear magnetic resonance. (JES)

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Document Details

Document Type
Technical Report
Publication Date
Jul 13, 1988
Accession Number
ADA198086

Entities

People

  • F. T. Gentile
  • U. W. Suter
  • W. R. Meyer

Organizations

  • Massachusetts Institute of Technology

Tags

DTIC Thesaurus Topics

  • Absorption
  • Chemical Engineering
  • Chlorides
  • Computers
  • Heat Treatment
  • Isomers
  • Liquid Crystals
  • Magnetic Resonance
  • Materials
  • Measurement
  • Mechanical Properties
  • Molecular Weight
  • Nuclear Magnetic Resonance
  • Reactivities
  • Resonance
  • Thermal Resistance
  • Vapor Pressure

Readers

  • Control Systems Engineering.
  • Polymer Science and Technology
  • Strategic Security Studies