Torsional Pendulum Study on Several Epoxy/Diamine Polymers,

Abstract

The purpose of this study is to determine the thermomechanical properties by using the torsional pendulum on the following epoxies: diglycidyl ether of bisphenol A, resorcinol diglycidyl ether, and butanediol diglycidyl ether with the following diamines propanediamine, hexanediamine, dodecanediamine, and m-phenylenediamine. There were at most three transitions in the temperature range of -150 to 200 C. The glass transition was strongly influenced by the degree of aromaticity and chain length of the amine monomers. The activation energies of the gamma transition were between 17 and 29 kcal/mole. The gamma transition which occurs at -55 C at 1 Hz, dominated the ultrasonic properties of these polymers around room temperature. The torsional pendulum was shown to be a convenient method to determine the ultrasonic properties of polymers provided the activation energies of the gamma transition are known. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 31, 1977
Accession Number
ADA050478

Entities

People

  • G. F. Lee

Organizations

  • Naval Ordnance Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Properties
  • Dermatologic Agents
  • Frequency
  • Glass
  • Glass Transition Temperature
  • Heat Of Activation
  • Materials
  • Materials Laboratories
  • Mechanical Properties
  • Molecules
  • Navy
  • Physical Properties
  • Polymers
  • Shear Modulus
  • Shear Properties
  • Transition Temperature
  • Ultrasonic Properties

Readers

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