Barrier properties of plasma-modified polypropylene and polyethyleneterephthalate
| Autor: | Dietrich Prescher, Andreas Lippitz, Wolfgang E. S. Unger, J. Erdmann, Jörg F. Friedrich, H. Wittrich, L. Nick, H.-V. Gorsler, L. Wigant |
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| Rok vydání: | 1995 |
| Předmět: |
Polypropylene
chemistry.chemical_classification Materials science chemistry.chemical_element Surfaces and Interfaces General Chemistry Plasma Polymer Permeation Surface energy Surfaces Coatings and Films Solvent chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials Polymer chemistry Materials Chemistry Fluorine Molecule |
| Zdroj: | Journal of Adhesion Science and Technology. 9:1165-1180 |
| ISSN: | 1568-5616 0169-4243 |
| Popis: | Plasma treatment changes the solvent absorption and permeation as well as the swelling properties of polymers. Enchanced solvent absorption and swelling are effects of an improved solvent compatibility. The plasma introduces a large number of different groups at the polymer surface depending on the nature of the plasma. Fluorine-containing plasmas can replace hydrogen atoms of the polymer molecule with fluorine atoms. Moreover, fluorine-containing plasma polymer layers can be formed. All these processes reduce the resulting surface free energy, reduce the diffusion length of solvent molecules, and produce a barrier layer. We have studied the formation of solvent barriers by plasma fluorination and by crosslinking by ultraviolet (UV) radiation. Thin foils of polypropylene (PP) and polyethyleneterephthalate (PET) were used as substrates. CF4, SF6, and SOF2 were applied as sources of fluorine atoms. Hexafluoropropene, tetrafluorethylene, and perfluorohexylethylene form plasma polymer layers on the polymer su... |
| Databáze: | OpenAIRE |
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