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Enhancing adhesion between metals or epoxy and polytetrafluoroethylene by ion assisted reaction

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Abstract

Ion irradiation on polytetrafluoroethylene (PTFE) has been carried out to improve adhesions to metals and to adhesive cements. Argon ions were irradiated on the polymer, by varying the amount of Ar+ from 1 × 1014 ions/cm2 to 1 × 1017 ions/cm2 at 1 keV, and 4 ml/min of oxygen gas flowed near the polymer surface during the ion irradiation. The wetting angle of water on the PTFE surface was changed from 100° to 70–150°, depending on the ion beam condition. The changes of the wetting angle and effects of Ar+ irradiation in oxygen environment were explained by the changes in surface morphology due to the ion beam irradiation onto PTFE, and formation of a hydrophilic group due to a reaction between the irradiated polymer chain and the blown oxygen. Strongly enhanced adhesion is explained by interlock mechanism, formation of electron acceptor groups on the modified PTFE, and interfacial chemical reactions between the irradiated surface and the deposited materials.

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Authors and Affiliations

  1. Division of Ceramics, Korea Institute of Science and Technology, Cheongryang, P.O. Box 131, Seoul, 130-650, Korea

    S. K. Koh, J. W. Seok, S. C. Choi, W. K. Choi & H. J. Jung

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  1. S. K. Koh
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  2. J. W. Seok
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  3. S. C. Choi
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  4. W. K. Choi
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  5. H. J. Jung
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Koh, S.K., Seok, J.W., Choi, S.C. et al. Enhancing adhesion between metals or epoxy and polytetrafluoroethylene by ion assisted reaction. Journal of Materials Research 13, 1363–1367 (1998). https://doi.org/10.1557/JMR.1998.0193

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  • DOI: https://doi.org/10.1557/JMR.1998.0193

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