Accession Number : ADA262326


Title :   The Study of Fiber-Matrix Interactions via FT-IR Microscopy and NMR imaging


Descriptive Note : Technical rept.


Corporate Author : CASE WESTERN RESERVE UNIV CLEVELAND OHDEPT OF MACROMOLECULAR SCIENCE


Personal Author(s) : Mavrich, A ; Fondeur, F ; Ishida, H ; Koenig, J L ; Wagner, D H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a262326.pdf


Report Date : Mar 1993


Pagination or Media Count : 25


Abstract : Model composites of Kevlar-49 and D-glass fiber/epoxy systems were analyzed using NMR imaging and FT-IR microscopy. The surfaces of both reinforcing agents were found to significantly affect the curing process of the epoxy. The NMR images reveal an accelerated rate of cure in the proximity of the fibers as compared to the bulk, indicating strong interactions between the fibers and the matrices. To spectroscopically characterize these interactions, FT-IR microscopy was performed on Kevlar reinforced microcomposites. Transmission spectra and IR functional group images reveal a preferential segregation of the epoxy resin to the fiber surface. Thin films of epoxy resin deposited on single Kevlar filaments were also examined using FT-IR microscopy. Spectra and IR images from these samples suggest that the amine group of the Kevlar fiber is reacting with the epoxide ring of the resin to catalyze the curing process.


Descriptors :   *NUCLEAR MAGNETIC RESONANCE , *INFRARED SPECTROSCOPY , *GLASS FIBERS , *FOURIER SPECTROSCOPY , MODELS , INTERACTIONS , POLYAMIDE PLASTICS , RATES , MICROSCOPY , SURFACES , AMINES , INFRARED IMAGES , FILAMENTS , CURING , RINGS , EPOXY RESINS


Subject Categories : Refractory Fibers
      Atomic and Molecular Physics and Spectroscopy


Distribution Statement : APPROVED FOR PUBLIC RELEASE