Characterization of Acetylene-Terminated Resin Cure States

Abstract

Acetylene-terminated oligomers are being considered for use in high- service-temperature adhesives and composites. It is thought that these resins cure via numerous pathways to produce different chemical structures such that the properties of the cured resin may be a strong function of the time- temperature cure schedule. Fourier transform infrared (FT IR), nuclear magnetic resonance (NMR), and electron paramagnetic resonance (EPR) experiments were performed to characterize the cure states of 4,4-bis(3-ethynylphenoxy)diphenyl- sulfone (ATS). Measurements were performed at selected times during isothermal cures at 403K, 423K, and 453K. Independent cure-state parameters were derived from IR absorbance changes, IR frequency shifts, H1 NMR relaxation times, C13 NMR magic-angle spinning spectral areas, and EPR-determined concentrations of free radicals produced during polymerization. Preliminary postcure studies were performed. Originator-supplied keywords include: Acetylene-terminated sulfone (ATS).

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Document Details

Document Type
Technical Report
Publication Date
Aug 09, 1984
Accession Number
ADA149463

Entities

People

  • A. C. Lind
  • R. L. Levy
  • T. C. Sandreczki

Tags

Communities of Interest

  • Cyber
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemical Reactions
  • Chemical Shifts
  • Composite Materials
  • Free Radicals
  • Frequency
  • Frequency Shift
  • Glass Transition Temperature
  • Magnetic Resonance
  • Mainframe Computers
  • Materials
  • Materials Laboratories
  • Measurement
  • Nuclear Magnetic Resonance
  • Relaxation Time
  • Resins
  • Resonance
  • Spectra

Fields of Study

  • Materials science

Readers

  • Image Processing and Computer Vision.
  • Polymer Science and Technology
  • Surface Coatings Technology.

Technology Areas

  • Microelectronics