Effect of jet fuel exposure on advanced aerospace composites. I: Thermal and chemical analysis. Final technical report, May 89-May 90
The sensitivity of several aerospace composite materials to military jet engine fuel, JP-4, was investigated in this study. The effect of fuel on the physical and mechanical properties was evaluated. The absorption rates of JP-4 into the composites and the effects of JP-4 exposure on the mechanical properties of the composites were given in WRDC-TR-90-4064. Thermal analysis of the composite materials including TMA and DSC was performed and is reported here. During exposure to JP-4, the only composite materials that absorbed an appreciable amount of fuel were the APC-2 (+ or - 45)2S and HTA (+ or - 45)2S coupons. Chemical species desorbed from these composite specimens using a vacuum desorption apparatus developed in-house were analyzed using GC-MS and the results are reported here. As expected, HTA and APC-2 coupons tested at elevated temperatures after exposure to JP-4 had lower levels of the more volatile components of JP-4 than did the HTA and APC-2 coupons exposed to JP-4 and tested at room temperature. The more volatile components are more mobile and more likely to desorb from the polymer at elevated temperatures. APC-2 was found to have significant quantities of Phenol present. This is attributed to the slightly polar character of the poly-(aryl ether ether ketone) (PEEK) matrix thermoplastic of APC-2.
- Research Organization:
- Wright Lab., Wright-Patterson AFB, OH (United States)
- OSTI ID:
- 5457838
- Report Number(s):
- AD-A-246559/9/XAB; WL-TR--91-4017
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360604* -- Materials-- Corrosion
Erosion
& Degradation
AROMATICS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COMPOSITE MATERIALS
CORROSION
CORROSIVE EFFECTS
DESORPTION
EQUIPMENT
FUELS
HYDROXY COMPOUNDS
JET ENGINE FUELS
MATERIALS
MECHANICAL PROPERTIES
MILITARY EQUIPMENT
ORGANIC COMPOUNDS
PHENOLS
PHYSICAL PROPERTIES
POLAR REGIONS
POLYMERS
SENSITIVITY
THERMAL ANALYSIS
VOLATILITY