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�������պ����ѧѧ�� 2008, Vol. 34 Issue (06) :618-621    DOI:
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UV treatment of blended epoxy resin and its surface chemical reaction
Yang Guang, Huang Pengcheng*
School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� 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��
Keywords�� epoxy resins   blending   silicones   ultraviolet (UV) curing   chemical reaction     
Received 2007-05-29;
Fund:

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About author: �� ��(1966-),Ů,��������������,������,yangguang@buaa.edu.cn.
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���, ������.����������֬�Ĺ�̻�������滯ѧ��Ӧ[J]  �������պ����ѧѧ��, 2008,V34(06): 618-621
Yang Guang, Huang Pengcheng.UV treatment of blended epoxy resin and its surface chemical reaction[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(06): 618-621
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2008/V34/I06/618
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