ENHANCEMENT OF ATOMIC OXYGEN-INDUCED EROSION OF SPACECRAFT POLYMERIC MATERIALS BY SIMULTANEOUS ULTRAVIOLET EXPOSURE

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ENHANCEMENT OF ATOMIC OXYGEN-INDUCED EROSION OF SPACECRAFT POLYMERIC MATERIALS BY SIMULTANEOUS ULTRAVIOLET EXPOSURE

ENHANCEMENT OF ATOMIC OXYGEN-INDUCED EROSION OF SPACECRAFT POLYMERIC MATERIALS BY SIMULTANEOUS ULTRAVIOLET EXPOSURE

YOKOTA, KUMIKO / OHMAE, NOBUO / TAGAWA, MASAHITO

Abstract Synergistic effect on atomic oxygen-induced erosion of polyethylene and polyimide with 172 nm vacuum ultraviolet was investigated using a quartz crystal microbalance. In order to adjust the relative intensity of atomic oxygen and vacuum ultraviolet, the sample was rotated with an axis perpendicular both to the axes of atomic oxygen and ultraviolet. The erosion rate of polymers by ultraviolet exposure alone is independent of the incident angle of ultraviolet, whereas that by atomic oxygen alone follows cosine function. It was observed that the erosion rate of polyethylene increased 30–100% by a simultaneous exposure of 172 nm vacuum ultraviolet and 5 eV atomic oxygen depending on the relative intensity. The erosion of oxygen covered-polyethylene was three times greater than that of nonoxidized polyethylene. These erosion properties suggested that two independent erosion pathways exist in a simultaneous atomic oxygen and ultraviolet exposure condition; the atomic oxygen-induced erosion and the ultraviolet-induced erosion associated with oxidation.

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Title :

ENHANCEMENT OF ATOMIC OXYGEN-INDUCED EROSION OF SPACECRAFT POLYMERIC MATERIALS BY SIMULTANEOUS ULTRAVIOLET EXPOSURE

Contributors:

YOKOTA, KUMIKO (author) / OHMAE, NOBUO (author) / TAGAWA, MASAHITO (author)

Published in:

PROTECTION OF MATERIALS AND STRUCTURES FROM THE SPACE ENVIRONMENT ; 141-152

Space Technology Proceedings ; 6

Publication date :

2006-01-01

Size :

12 pages

ISBN :

978-1-4020-4319-2 , 978-1-4020-4281-2

ISSN :

DOI :

https://doi.org/10.1007/1-4020-4319-8_14

Type of media :

Article/Chapter (Book)

Type of material :

Electronic Resource

Language :

English

Keywords :

Atomic Oxygen , Erosion Rate , Incident Angle , Quartz Crystal Microbalance , Vacuum Ultraviolet Engineering , Automotive Engineering , Mechanical Engineering , Polymer Sciences , Extraterrestrial Physics, Space Sciences

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