Structural and Tribological Properties of Polyimide/Al2O3/SiO2 Composites in Atomic Oxygen Environment

Effects of atomic oxygen (AO) irradiation on the structural and tribological behaviors of polyimide/Al 2 O 3 /SiO 2 composites were investigated in a ground-based simulation facility, in which the energy of AO was about 5 eV and the flux was 7.2 × 10 15 cm −2 .s −1 . The structural changes were char...

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Bibliographic Details
Published in:Journal of macromolecular science. Physics 2012-02, Vol.51 (2), p.224-234
Main Authors: Liu, Baixing, Pei, Xianqiang, Wang, Qihua, Sun, Xiaojun, Wang, Tingmei
Format: Article
Language:English
Subjects:
Applied sciences
atomic oxygen
Composites
degradation
Exact sciences and technology
Forms of application and semi-finished materials
irradiation
polyimide
Polymer industry, paints, wood
Technology of polymers
tribological properties
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Summary:Effects of atomic oxygen (AO) irradiation on the structural and tribological behaviors of polyimide/Al 2 O 3 /SiO 2 composites were investigated in a ground-based simulation facility, in which the energy of AO was about 5 eV and the flux was 7.2 × 10 15 cm −2 .s −1 . The structural changes were characterized by X-ray photoelectron spectroscopy (XPS) and attenuated total-reflection FTIR (FTIR-ATR), while the tribological changes were evaluated by friction and wear tests as well as scanning electron microscopy (SEM) analysis of the worn surfaces. It was found that AO irradiation induced the oxidation and degradation of polyimide (PI) molecular chains. The destructive action of AO changed the surface chemical structure, which resulted in changes of the surface morphology and chemical composition of the samples. Friction and wear tests indicated that AO irradiation decreased the friction coefficient but increased the wear rate of both pure and Al 2 O 3 /SiO 2 filled PIs.
ISSN:0022-2348
1525-609X
DOI:10.1080/00222348.2011.585319