Accession Number:

ADA468812

Title:

MURI Center for Materials Chemistry in the Space Environment

Descriptive Note:

Final technical rept. 1 May 2001-31 Nov 2006

Corporate Author:

CHICAGO UNIV IL DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

2006-11-30

Pagination or Media Count:

49.0

Abstract:

MURI research activities, involving strong interactions between experiment and theory, including interactions with AFRL, NASA, and Boeing, have advanced knowledge of condensed-phase and gas-phase reactions relevant to materials reactivity in LEO. We have elucidated the mechanism by which graphite is eroded by high-kinetic energy atomic oxygen quantified the pathways by which organic molecules react with atomic oxygen in regimes not found in the terrestrial environment explored hyperthermal O chemistry with gas-phase model organic compounds to delineate quantum chemical reaction dynamics appropriate to LEO discovered a new gas-surface collisional energy-transfer mechanism in which atoms become embedded and re-emitted from thin organic films with specific directionality and excess momentum, contributing to a refined understanding of collisional energy transfer developed new theoretical methodologies for treating rare events which can dominate the morphological evolution of eroding interfaces - including the first three-dimensional code that incorporates realistic interfacial chemical reactions with large surface area processes explored synergistic effects in polymer degradation involving atomic oxygen and short-wavelength radiation commensurate with LEO solar illumination collaborated with AFRLs to understand the efficacy of hybrid organicinorganic POSS materials and are important partners in orbital experiments, MISSE-5 and -6, which seek to better define materials degradation in LEO.

Subject Categories:

  • Physical Chemistry
  • Non-electrical Energy Conversion

Distribution Statement:

APPROVED FOR PUBLIC RELEASE