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http://dx.doi.org/10.7317/pk.2012.36.4.461

Improvement of Wettability and Removal of Skin Layer on Ar-Plasma-Treated Polypropylene Blend Surface  

Weon, Jong-Il (Department of Safety Engineering, Dongguk University)
Lee, Sun-Yong (Department of Safety Engineering, Dongguk University)
Publication Information
Polymer(Korea) / v.36, no.4, 2012 , pp. 461-469 More about this Journal
Abstract
The surface modification and characterization of Ar-plasma treated polypropylene (PP) blend are investigated using x-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and contact angle measurement. An increase in Ar-plasma treatment time leads to an increase in wettability, oxygen containing polar functional groups, the amount of talc, and surface roughness on the PP blend surface. A careful observation using SEM indicates that there exists a skin layer consisting of only PP component. The difference in viscosity between PP and rubber particles facilities the formation of skin layer. However, it is found that an increase in Ar-plasma treatment time helps to decrease the thickness of skin layer. Additional methodologies for the elimination of skin layer during injection molding are also discussed. The surface modification and morphological alteration induced by Ar-plasma treatment provides a hydrophilic state, followed by the improvement in wettability, on the PP blend surface.
Keywords
plasma treatment; etching; skin layer; surface modification; wettability;
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Times Cited By KSCI : 2  (Citation Analysis)
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