Cure Analysis of Epoxy Composites Using Fourier Transform Infrared Spectroscopy.
Abstract
Fourier transform infrared spectroscopy (FT-IR) has been used to measure the extent of cure in fiber-reinforced epoxy composites and the corresponding resin matrixes. Two sampling techniques have been used to study the curing processes: (1) thin films of neat resin held between salt plates and (2) internal reflectance spectroscopy (IRS). Thin films have been studied by curing them in a temperature-controlled cell that allowed the same temperature program to be followed that was used in the corresponding composite fabrication. Infrared spectra were recorded at short time intervals throughout the cure cycle and the results were used to measure extent of cure based on epoxide ring absorbance at approximately 915 wave numbers. Internal reflectance measurements were performed on the corresponding composite materials and results were compared with the thin film measurements.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1978
- Accession Number
- ADA067197
Entities
People
- Bernard M. Halpin Jr.
- James F. Sprouse
- Robert E. Sacher
Organizations
- United States Army Research Laboratory