Zhao Libin, Long Liping, Cai Qingyunet al. Dynamic properties of noise barrier structure subjected to train-induced impulsive wind pressure[J]. Journal of Beijing University of Aeronautics and Astronautics, 2009, 35(4): 505-508. (in Chinese)
Citation: Yang Guang, Huang Pengcheng. UV treatment of blended epoxy resin and its surface chemical reaction[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(06): 618-621. (in Chinese)

UV treatment of blended epoxy resin and its surface chemical reaction

  • Received Date: 29 May 2007
  • Publish Date: 30 Jun 2008
  • The cationic ultraviolet (UV) curing blends of bisphenol A epoxy resin E-44 and silicone-epoxy resin ES-06 were investigated. The UV-curing condition was explored to optimize blended resin formulation. The variations of physical and chemical properties of UV-cured sample surfaces were investigated by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results indicate that the photocuring rate of the blended resins is promoted with the increase of E-44 mass fraction in the presence of 5% of a diaryliodonium salt photoinitiator. The gel conversion of a 1∶ 2 mass ratio blend of ES-06 and E-44 reaches 93% after 15-min of UV irradiation. Based on XPS data, it is found that the UV-cured sample surface has been incompletely oxidized by the ozone and atomic oxygen produced by UV radiation from atmospheric oxygen. It may be proposed that the UV-cured materials produce a SiO x film containing carbon atom at the surface of the sample.

     

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