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Proceedings Paper

Application Of Fourier Transform Infrared Spectroscopy For Quality Control Analysis Of Epoxy Resin Prepregs Used In Helicopter Rotor Blades
Author(s): T. F. Saunders; M. Ciulla; S. Wehner; J. Brown
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Paper 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.

Paper Details

Date Published: 29 October 1981
PDF: 3 pages
Proc. SPIE 0289, 1981 Intl Conf on Fourier Transform Infrared Spectroscopy, (29 October 1981); doi: 10.1117/12.932198
Show Author Affiliations
T. F. Saunders, Army Materials and Mechanics Research Center (United States)
M. Ciulla, Army Materials and Mechanics Research Center (United States)
S. Wehner, Army Materials and Mechanics Research Center (United States)
J. Brown, Army Materials and Mechanics Research Center (United States)


Published in SPIE Proceedings Vol. 0289:
1981 Intl Conf on Fourier Transform Infrared Spectroscopy
Hajime Sakai, Editor(s)

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