Combined XPS and contact angle studies of ethylene vinyl acetate and polyvinyl acetate blends
Applied Surface Science
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/21778
In this study, we prepared thin films by blending ethylene vinyl acetate copolymers (EVA) containing 12-33 (wt.%) vinyl acetate (VA) with polyvinyl acetate (PVAc) and high density polyethylene homopolymers. Large area micropatterns having controlled protrusion sizes were obtained by phase-separation especially for the PVAc/EVA-33 blends using dip coating. These surfaces were characterized by XPS and contact angle measurements. A reasonably linear relation was found between the VA content on the surface (wt.%) obtained from XPS analysis and the VA content in bulk especially for PVAc/EVA-33 blend surfaces. PE segments were more enriched on the surface than that of the bulk for pure EVA copolymer surfaces similar to previous reports and VA enrichment was found on the EVA/HDPE blend surfaces due to high molecular weight of HDPE. Water θe decreased with the increase in the VA content on the blend surface due to the polarity of VA. A good agreement was obtained between γs-and atomic oxygen surface concentration with the increase of VA content. The applicability of Cassie-Baxter equation was tested and found that it gave consistent results with the experimental water contact angles for the case where VA content was lower than 55 wt.% in the bulk composition. © 2011 Elsevier B.V. All rights reserved.
- Research Paper 
Showing items related by title, author, creator and subject.
Selective adsorption of L1210 leukemia cells/human leukocytes on micropatterned surfaces prepared from polystyrene/polypropylene-polyethylene blends Gengec, N.A.; Gulsuner H.U.; Erbil H.Y.; Tekinay, A.B. (Elsevier, 2014)The objective of this study is to prepare polymeric surfaces which will adsorb L1210 leukemia cells selectively more than that of healthy human leukocytes in order to develop new treatment options for people with leukemia. ...
Ucar, I. O.; Doganci, M. D.; Cansoy, C. E.; Erbil, H. Y.; Avramova, I.; Suzer, S. (Elsevier, 2011-09-01)In this study, we prepared thin films by blending ethylene vinyl acetate copolymers (EVA) containing 12-33 (wt.%) vinyl acetate (VA) with polyvinyl acetate (PVAc) and high density polyethylene homopolymers. Large area ...
Composition of γ-ray induced triethoxyvinylsilane-methyl methacrylate copolymers determined by XPS Çaykara, T.; Güven O.; Süzer, S. (1998)Methyl methacrylate (MMA) was copolymerized with triethoxyvinylsilane (TEVS) using 60Co-γ radiation at varying masses of the liquid monomers in the feed. Their homopolymers PMMA and PTEVS were also prepared by the same ...