Abstract
Polysulfide sealant is seriously aging in aeronautic jet fuel. The feature of aging proceeding of polysulfide sealant in jet fuel, chemical change of jet fuel in the high temperature air, and the effect of such change on polysulfide sealant were studied by the means of function detection, chemical analysis, and instrumental analysis. The factors and mechanism which induce seriously aging of polysulfide sealant in jet fuel were analyzed. The results shows that effect of both heat and oxygen leads strength and elasticity of polysulfide sealant to decrease greatly in jet fuel, and obvious weightlessness. The specific process was, at first, jet fuel was oxidized by oxygen in air, peroxide was greatly produced; then polysulfide sealant could be swellinged by hot jet fuel, its velocity of absorbing oxygen increased enormouslu, so degradation and cross-link interlaced to happen.
| Original language | English |
|---|---|
| Pages (from-to) | 79-82 |
| Number of pages | 4 |
| Journal | Hangkong Cailiao Xuebao/Journal of Aeronautical Materials |
| Volume | 27 |
| Issue number | 6 |
| Publication status | Published - Dec 2007 |
| Externally published | Yes |
Keywords
- Aging
- Mechanism
- Polysulfide sealant
ASJC Scopus subject areas
- Ceramics and Composites
- Aerospace Engineering
- Metals and Alloys
- Materials Chemistry