Permeability of Polymer Composites for Cryogenic Applications (Preprint)
AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
Pagination or Media Count:
Previous cryogenic cycling research has focused on improving our understanding of the mechanisms that lead to a leakage-producing network of cracks in carbonepoxy and carbonbismaleimide composites and to evaluate a number of materials for use in cryogenic pressure vessels. However, the large fuel tanks and other cryogenic components of future reusable launch vehicles may benefit from the use of even higher temperature composite materials through the reduction in the weight of the thermal protection system needed to protect the composite components inside the vehicle. Hence, the current effort investigated two carbonpolymer composites T650AFR-PE-4 and T650BIM-15 with service temperatures considerable greater than for most carbonepoxy and carbonbismaelimide composites. Additionally, to determine the effect of a more destructive thermal cycle, T650AFR-PE-4 samples were also subjected to thermal cycling that included an elevated hold of 315 C.
- Polymer Chemistry
- Laminates and Composite Materials