Nonlinear phenomena in the mass loss of polyimide films under hyperthermal atomic oxygen beam exposure

Hiroshi Kinoshita, Masahito Tagawa, Kumiko Yokota, Nobuo Ohmae

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Erosion phenomenon of polyimide film under the hyperthermal atomic oxygen beam exposure, which is a simulated low Earth orbit space environment, has been investigated. The polyimide film was spin-coated on a sensor crystal of a quartz crystal microbalance, and the mass of the film was measured under the atomic oxygen beam exposure. The spin-coated polyimide film which was exposed to a 4.7 eV atomic oxygen beam showed a mass gain at the beginning of the reaction and then steady-state mass loss followed. The experimental results of the mass change was analysed by the computational model, and the results showed that the carbon abstraction rate at the oxygen-adsorbed sites was two orders higher than that at the unoxidized polyimide surface. The computational results suggested that a large fraction of the carbon abstraction reaction occurred in the oxygen-adsorbed site through a Langmuir-Hinshelwood reaction mechanism.

Original languageEnglish
Pages (from-to)225-234
Number of pages10
JournalHigh Performance Polymers
Volume13
Issue number4
DOIs
Publication statusPublished - Dec 2001

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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