Journal
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
Volume 24, Issue 2, Pages 171-177Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijadhadh.2003.09.006
Keywords
plastics; surface modification; surface treatment by excited gases; plasma
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The polymers PET, PA6, PVDF, HD-PE, and PP are activated by a commercially available plasma jet system at atmospheric pressure to improve adhesive bondability. The adhesion properties of the activated surfaces are evaluated by lap shear tests. The results are correlated with the surface properties that are investigated by XPS, AFM, and contact angle measurements. In addition the influence of operational parameters of the plasma treatment is studied. The activated samples exhibit a substantially increased bonding strength. The improvement can be related to an increase of oxygen concentration, and to changes of the topology of the substrate surface induced by the thermal component of the plasma, The most influential parameters in the plasma treatment are the distance between substrate and nozzle exit and the treatment time. (C) 2003 Elsevier Ltd. All rights reserved.
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