NDLI: Investigation of the effects of cobalt ions on epoxy properties

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Investigation of the effects of cobalt ions on epoxy properties

Content Provider	NASA Technical Reports Server (NTRS)
Author	Stoakley, D. M. Singh, J. J.
Copyright Year	1986
Description	The effects of Co(acac)sub x complexes on MY-720 epoxy properties have been investigated. It appears that Co2(+) ions form antibonding or nonbonding orbitals which increase the free volume and also reduce the cohesiveness of the host epoxy. The effects of Co2(+) ions, on the other hand, seem to result in increased Cohesiveness of the epoxy. The experimental values of magnetic moments of both types of ions in MY-720 suggest that the orbital momentum contributions of the (3d) electrons are partially conserved, though the effect is more pronounced for Co2(+) ions. The coordination environment of the cobalt ions in the host epoxy does not appear to be uniquely defined. These results indicate that the effects of metal ions on resin properties cannot be easily predicted on the basis of ligand field theory argument alone. Complex interactions between metal ions and host epoxy molecular structure suggest the desirability of parallel experimental investigations of electronic, magnetic, and mechanical properties of metal ion-containing epoxy samples for comparison with theory.
File Size	931155
Page Count	16
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19870003247
Archival Resource Key	ark:/13960/t6547kz2k
Language	English
Publisher Date	1986-12-01
Access Restriction	Open
Subject Keyword	Nonmetallic Materials Spectroscopy Transition Metals Electron Density Concentration Free Electrons Mechanical Properties Ions Thermosetting Resins Positron Annihilation Cobalt Magnetic Permeability Epoxy Resins Investigation Ligands Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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