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    Physico-chemical characteristics of high performance polymer modified by low and atmospheric pressure plasma

    Year: 2012

    Journal: Surface Engineering and Applied Electrochemistry 2012, 48 (2) pp 117-126, 20121211

    Authors: Nitu Bhatnagar, Sangeeta Jha, Shantanu Bhowmik, Govind Gupta, J. B. Moon, C. G. Kim

    Organizations: Sikkim Manipal Institute of Technology, Majhitar, Rangpo, East Sikkim 737136, India; Singapore Institute for Manufacturing Technology, 71 Nanyang Drive, Singapore, 638075 Singapore; Faculty of Aerospace Engineering, Delft University of Technology, Delft, The Netherlands; Surface Physics and Nanostructures Group (EMD), National Physical Laboratory (CSIR), K.S. Krishnan Marg, New Delhi 110012, India; Department of Aerospace Engineering, KAIST, Daejeon, Republic of Korea

    In this work, the effect of low pressure plasma and atmospheric-pressure plasma treatment on surface properties and adhesion characteristics of high performance polymer, Polyether Ether Ketone (PEEK) are investigated in terms of Fourier Transform Infrared Spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and Atomic Force Microscopy (AFM). The experimental results show that the PEEK surface treated by atmospheric pressure plasma lead to an increase in the polar component of the surface energy, resulting in improving the adhesion characteristics of the PEEK/Epoxy adhesive system. Also, the roughness of the treated surfaces is largely increased as confirmed by AFM observation. These results can be explained by the fact that the atmospheric pressure plasma treatment of PEEK surface yields several oxygen functionalities on hydrophobic surface, which play an important role in increasing the surface polarity, wettability, and the adhesion characteristics of the PEEK/Epoxy adhesive system.