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Oxidising Role of Water Vapour in the 250 Kev D+ Induced Radiolysis of Polyimide Kapton-H a)

  • U. K. Chaturvedi (a1), A. Patnaik (a1), Ramji Pathak (a1), R. N. Chakraborty (a1) and A. K. Nigam (a1)...

Abstract

Residual water vapour present in the vacuum system has been observed to play a dominant oxidising role in the 250 keV D+ induced radiolysis of polyimide (Kapton-H). The partial pressure (pp) of water in the vacuum system decreases sharply as the D+ beam impinges the polymeric surface, but soon after, it recovers to its initial value as the accumulated dose increases. Emission of CO2 is observed which has its maximum at a time when the H2O partial pressure is at a minimum. The CO2 level also returns to its original level with time. This complementary variation of CO2 and H2O confirms that absorbed and adsorbed water molecules are radiolysed by the ion beam and initiate oxidation of the radiolytically evolved CO to yield CO2 on and within the ion implanted surface of the polyimide. Further, the small enhancement in the 28 amu peak (N2 + CO), which exhibits no maximum/minimum over the entire implantation time, can be understood in terms of the evolution of N2 from the imide ring as a result of radiolysis of this nitrogen containing polymers.

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a)

Trade name of Du Pont Inc.

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1. Chaturvedi, U.K., Patnaik, A. and Nigam, A.K., Rad. Effects. (in press 1987).
2. Ventatesan, T., Edelson, D. and Brown, W.L.; Appl.Phys. Lett. 34(4) (1983) 364, also see Nucl. Instr. Methods. BI (1984) 286 (same authors).
3. Puglisi, O., Marietta, G., Torrisi, A., Foti, G. and Torrisi, L., Rad. Eff. 65 (1982) 11.
4. Polyimides: Synthesis, Characterization and Applications; Mittal, K.L. (Ed.) Plenum Press, N.Y. 1984 and cited reference.
5. Coltman, R.R. Jr., J.Nucl. Mat. 108/109 (1982) 559.
6. Koren, G. and Yeh, J.T.C., J. Appl.Phys. 56 (1984) 2120.
7. Brannon, J.H., Lankard, J.R., Baise, A.I., Buras, F. and Kaufman, J.; J. Appl. Phys. 58 (1985) 2036.
8. Yeh, J.T.C.; J.Vac. Sci. Technol. A4 (1986) 653 and cited references.
9. Chaturvedi, U.K., Agrawal, S.K., Shrinet, V.,Rai, V.N. and Nigam, A.K. in REf. 4., p. 555.
10. Scrorg, C.E., J. Poly. Sci., Macromol. Rev. 11 (1976) 161.
11. Chapino, A., Radiation Chemistry of Polymeric Systems (Interscience Publications, N.Y. 1962) and cited references.
12. Dole, M. (ed.) The Radiation Chemistry of Macromolecules (Academic Press, N.Y. 1972).
13. Dole, M., Keeling, C.D. and Rose, D.G.; J. Am. Chem. Soc. 76 (1954) 4304. Also see R. Srinivasan, Polymer 23 (1982) 1863.
14. Shrinet, V., Ph.D. Thesis (1984), B.H.U., Varanasi, India.
15. Shrinet, V., Chaturvedi, U.K. and Nigam;, A.K. Nucl. Instr. Mech. B17 (1986) 46.
16. Kapton Polyimide film: Summary of Properties (Published by Du Pont Inc.).
17. Wilson, A.M. in Ref. 4 p. 721.Also see P.D. Frager at page 278 in ref.4.
18. Herndon, T.O., Burke, R.L. and Landoch, W.J. in ref. 4. p. 825.
19. Fuaro, R.L. in ref. 4 p. 1063.
20. Roth, A.: Vacuum Technology, North Holland Publishing Company, Amsterdam, 1982 pp. 1761.
21. Davenas, J., Xu, X.L., Khodr, C., Troilleux, M. and Steffan, G., Nucl. Instr. Meth. B7/8 (1985) 513.
22. Rossler, K. in Proc. Int. Workshop on the Atmosphere of Saturn and Titan, Alppach, Austria, Sept. 1985 (ESA SP-241, Dec. 1985) pp. 175–188 and cited references therein.
23. Nebeling, B., Rossler, K. and Schmitz, G. in Adv. Space Res. 1986 (Proc. COSPAR 1986) and cited references.
24. Coltman, R.R. Jr. and Klalunde, C.E.; J. Nucl. Mat. 103/104 (1981) 717.
25. Mirtich, M.J. and Sovey, J.S.; J. Vac. Sci. Technol. 15 (1978) 697.

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