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Abstract

A quantitative study of the synergistic effect of 5 eV atomic oxygen and 172 nm vacuum ultraviolet radiation exposure was carried out on polyimide samples. The relative intensity of atomic oxygen and ultraviolet was adjusted by rotating the polyimide sample at the crossover point of the beam axes of atomic oxygen and ultraviolet which crossed 900. The erosion rate of polyimide was calculated from the resonant frequency of the quartz crystal microbalance on which the polyimide was spin-coated. It was confirmed that the ultraviolet exposure to the atomic oxygen-exposed polyimide promoted the desorption of carbon oxides from the surface. In contrast, no mass change was detected when ultraviolet irradiated the polyimide surface without atomic oxygen exposure. By changing the relative intensity of atomic oxygen and ultraviolet, increases in erosion rates up to 400% were observed when the relative ultraviolet/atomic oxygen flux intensity reached 10-14 mJ atom-l.

Keywords

Atomic oxygen ultraviolet synergism lowearthorbit space environment

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References

[1] Brinza D E , Chung S Y Minton T K and Liang R H 1994 Final Report on the NASA/JPL Evaluation of Oxygen Interactions with Materials-3 (EOIM-3) JPL Publication 94-31

[2] Koontz S L , Leger L , Albyn K and Cross J B 1990 J Spacecraft Rockets 27 346-346

[3] Caledonia G E , Krech R H and Green D B 1987 AIAA Journal 25 5-5

[4] Tagawa M , Yokota K , Kinoshita H and Ohmae N 2003 Proceedings of the 9th International Symposium on Materials in a Space Environment, ESA-SP540, p.265-265

[5] Kinoshita H , Tagawa M , Umeno M and Ohmae N 1998 Trans. Japan Soc. Aeronautics Space Sci. 41 94-94

[6] Kinoshita H , Tagawa M , Yokota K and Ohmae N 2001 High Perf; Polymers 13 225-225

[7] Yokota K , Tagawa M and Ohmae N 2002 J. Spacecraft Rockets 39 155-155

[8] Kinoshita H , Tagawa M , Umeno M and Ohmae N 1999 Surface Sci. 440 49-49

[9] Gotoh K , Tagawa M , Ohmae N , Kinoshita H and Tagawa M , 2001 Colloid Polymer Sci. 279 214-214

10.

[10] Kleiman J , Gudimenko Y I , Iskanderova Z A , Tennyson R C , Morison W D , McIntyre M S and Davidson R 1995 Surface Interface Anal. 23 335-335

11.

[11] Brezini A and Zekri N 1994 J. Appl. Phys. 75 2015-2015

12.

[12] Yokota K , Tagawa M , Ohmae N and Kinoshita H 2000 Book ofAbstracts of the 44 th Space Technology and Science Conference 198 in Japanese

13.

[13] Tagawa M , Suetomi T , Kinoshita H , Umeno M and Ohmae N 1999 Trans. Japan Soc. Aeronautics Space Sci. 42 40-40

14.

[14] Minton T K and Garton D J 2000 Chemical Dynamics in Extreme Environments. Advanced Series in Physical Chemistry ( Singapore: World Scientific ) 420-420

15.

[15] Zhang J , Garton D J and Minton T K 2000 Proceedings of the International Symposium on Materials in a Space Environment 589-589

16.

[16] Schnabel N 1982 Polymer Degradation - Principles and Practical Applications ( Munich: Carl Hanser Verlag )

17.

[17] Anderson B. J. (ed), 1994, Natural Orbital Environment Guidelines for Use in Aerospace Vehicle Development, NASA-TM4527

Effect of Relative Intensity of 5 eV Atomic Oxygen and 172 nm Vacuum Ultraviolet in the Synergism of Polyimide Erosion

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