Application Of Fourier Transform Infrared Spectroscopy For Quality Control Analysis Of Epoxy Resin Prepregs Used In Helicopter Rotor Blades

T. F. Saunders; M. Ciulla; S. Wehner; J. Brown

doi:10.1117/12.932198

29 October 1981 Application Of Fourier Transform Infrared Spectroscopy For Quality Control Analysis Of Epoxy Resin Prepregs Used In Helicopter Rotor Blades

T. F. Saunders, M. Ciulla, S. Wehner, J. Brown

Author Affiliations +

Proceedings Volume 0289, 1981 Intl Conf on Fourier Transform Infrared Spectroscopy; (1981) https://doi.org/10.1117/12.932198
Event: 1981 International Conference on Fourier Transform Infrared Spectroscopy, 1981, Columbia, United States

Abstract

The SP-250 epoxy resin/glass fiber prepreg system is one of the basic organic materials of prime importance to the U.S. Army and U.S. Navy. It is presently being used in the rotor blades for the CH-46 and CH-47 helicopters. Present quality control analytical methods involve complex and time-consuming HPLC or GPC procedures. In the present work, Fourier Trinsform Infrared Spectroscopy (FT-IR) spetra were interpreted quantitatively with relative absorbances 1140cm-1 C-0-C, 1080cm-1 aromatic Cl, and 915cm-1 epoxide peaks. These frequencies were normalized to the 1510cm-1 aromatic peak. Quantitative absorbances were determined using the baseline method. FT-IR allows reproducible quantitative absorbance determinations with statistically good reproducibility. Spectra were obtained from thin films of THF/DMF extracts from the epoxy/glass prepreg cast on KBr plates. Quantitative absorbance determination from FT-IR provides enough information from a single spectrum, with five functional group peak absorbances being measured, to allow acceptance or rejection of lots of prepreg.

Citation Download Citation

T. F. Saunders, M. Ciulla, S. Wehner, and J. Brown "Application Of Fourier Transform Infrared Spectroscopy For Quality Control Analysis Of Epoxy Resin Prepregs Used In Helicopter Rotor Blades", Proc. SPIE 0289, 1981 Intl Conf on Fourier Transform Infrared Spectroscopy, (29 October 1981); https://doi.org/10.1117/12.932198

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