Please use this identifier to cite or link to this item: https://doi.org/10.1163/156856199X01036
Title: Adhesion enhancement of thermally evaporated aluminum to surface graft copolymerized poly(tetrafluoroethylene) film
Authors: Zhang, M.C.
Kang, E.T. 
Neoh, K.G. 
Tan, K.L. 
Keywords: adhesion
aluminum
graft copolymerization
plasma
Poly(tetrafluoroethylene)
XPS
Issue Date: 1999
Source: Zhang, M.C., Kang, E.T., Neoh, K.G., Tan, K.L. (1999). Adhesion enhancement of thermally evaporated aluminum to surface graft copolymerized poly(tetrafluoroethylene) film. Journal of Adhesion Science and Technology 13 (7) : 819-835. ScholarBank@NUS Repository. https://doi.org/10.1163/156856199X01036
Abstract: Surface modifications of Ar plasma-pretreated poly(tetrafluoroethylene) (PTFE) film via UV-induced graft copolymerization with glycidyl methacrylate (GMA) and 1-vinylimidazole (VIDz) were carried out to improve the adhesion with evaporated aluminum metal. The surface compositions of the graft copolymerized PTFE films were studied by X-ray photoelectron spectroscopy (XPS). The adhesion strength of the evaporated aluminum to the surface graft copolymerized PTFE film was affected by the type of monomer used for graft copolymerization, the graft concentration, the plasma post-treatment of the graft copolymerized PTFE surface prior to metallization, and the extent of thermal treatment after metallization. The optimum T-peel adhesion strengths of the Al/PTFE laminates were in excess of 10 and 5 N/cm, respectively, for the GMA and VIDz graft copolymerized PTFE films. These adhesion strengths are significantly higher than those obtained between the evaporated aluminum and the pristine or plasma-pretreated PTFE film. The mechanism of adhesion enhancement and the failure of the metal-polymer assembly were also investigated. It was observed that the failure occurred within the PTFE film. The strong adhesion between Al and PTFE arises from the charge-transfer interaction between the Al atom and the epoxide moiety of the grafted GMA polymer, as well as from the fact that the graft chains are covalently tethered on the PTFE film surface as a result of the grafting process. © 1999 VSP.
Source Title: Journal of Adhesion Science and Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/66430
ISSN: 01694243
DOI: 10.1163/156856199X01036
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