Accession Number:

ADA172367

Title:

Evaluation of Epoxy Composites Using Photoacoustic Fourier Transform Infrared Spectroscopy

Descriptive Note:

Final rept.

Corporate Author:

ARMY LAB COMMAND WATERTOWN MA MATERIAL TECHNOLOGY LAB

Personal Author(s):

• Sloan, James M.

Report Date:

1986-07-01

Pagination or Media Count:

13.0

Abstract:

Fourier transform infrared spectroscopy FT-IR using a photoacoustic sampling cell has been used to obtain high quality infrared spectra of various fiber-reinforced epoxy composites and the corresponding resin matrixes. Photoacoustic spectroscopy PAS offers the advantages of having little or no sample preparation for high quality spectra to be obtained and no alignment of the infrared incident beam is necessary. This makes PAS an ideal sampling method for in-field testing of composite laminates. The spectra revealed information on the degree of cure of the resin system by monitoring the 915cm absorption band and the type of reinforcement material used glass or Kevlar.

Descriptors:

• *INFRARED SPECTROSCOPY
• *EPOXY COMPOSITES
• FOURIER TRANSFORMATION
• SPECTROSCOPY
• CELLS
• POLYMERS
• COMPOSITE MATERIALS
• LAMINATES
• FIBER REINFORCED COMPOSITES
• MATRICES(CIRCUITS)
• REINFORCING MATERIALS
• INFRARED SPECTRA
• MATRIX MATERIALS
• ALIGNMENT
• SPECTRA
• SAMPLING
• ABSORPTION SPECTRA
• CURING
• INFRARED RADIATION

Subject Categories:

• Laminates and Composite Materials
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE