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Journal of Materials Science

, Volume 41, Issue 21, pp 7011–7018 | Cite as

Mechanism of cyclohexene vapor curing polycarbosilane fibers

  • W. Li
  • Y. C. Song
  • X. H. Mao
Article

Abstract

Cyclohexene vapor, instead of air, is applied to cure polycarbosilane (PCS) fibers. The cured fibers are characterized by infrared (IR), electron spin resonance (ESR), elements analysis (EA) and simulated through the HyperChemTM program for comparison. The curing process is investigated by thermoanalysis. The results indicate that the Si–H and Si–CH3 bonds in PCS are induced by cyclohexene to cleavage and form Si-central radicals. A fully developed cross-linking fibers come into being through the combination of these radicals, and the byproducts, some cyclohexyls bonded onto PCS derived from cyclohexene, introduce the variations in IR spectra, weight gain and carbon contents increase of PCS. On the basis of investigation and simulation, a likely mechanism of curing reaction is presented.

Keywords

Electron Spin Resonance Cyclohexene Electron Spin Resonance Spectrum Cyclohexyl Carbon Content Increase 

Notes

Acknowledgement

We are grateful to Professor Shiming Chen (Fudan University) for performing ESR-measurements and also for useful discussions and advices.

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Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  1. 1.State Key Laboratory of Advanced Ceramic Fibers & Composites, College of Aerospace and Materials EngineeringNational University of Defense TechnologyChangshaPeople’s Republic of China

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