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Stability of atmospheric-pressure plasma induced changes on polycarbonate surfaces
- Source :
-
Journal of Electrostatics . Apr2007, Vol. 65 Issue 4, p269-273. 5p. - Publication Year :
- 2007
-
Abstract
- Abstract: Polycarbonate films are subjected to plasma treatment in a number of applications such as improving adhesion between polycarbonate and silicon alloy in protective and optical coatings. The surfaces that undergo changes in surface properties due to plasma treatment have a tendency to revert back to their original states. Thus, the stability of the plasma induced changes on polymer surfaces over a desired time period is an important issue. The objective of this study was to examine the effect of ageing on atmospheric-pressure helium-plasma treated polycarbonate (PC) sample as a function of treatment time. The ageing effects were studied over a period of 10 days. The samples were plasma treated for 0.5, 2, 5 and 10min. Contact angle made by water droplet on polymer surfaces were measured to study surface energy changes. Modification of surface chemical structure was examined using X-ray photoelectron spectroscopy (XPS). Contact angle decreased from 93° for untreated samples to 30° for samples treated with plasma for 10min. After 10 days the contact angle for the 10min plasma treated sample increased to 67°, but it never reverted back to that of the untreated surface. Similarly, the oxygen-carbon (O:C) ratio increased from 0.136 for untreated samples to 0.321 for 10min plasma-treated samples, indicating an increase in surface energy. [Copyright &y& Elsevier]
- Subjects :
- *PLASMA chemistry
*POLYCARBONATES
*SURFACE chemistry
*SURFACES (Technology)
Subjects
Details
- Language :
- English
- ISSN :
- 03043886
- Volume :
- 65
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Journal of Electrostatics
- Publication Type :
- Academic Journal
- Accession number :
- 23742262
- Full Text :
- https://doi.org/10.1016/j.elstat.2006.10.001