Plasma-based introduction of monosort functional groups of different type and density onto polymer surfaces. Part 1: Behaviour of polymers exposed to oxygen plasma
| Autor: | Wolfgang E. S. Unger, Gerhard Kühn, Sh. Geng, Archana Ghode, Andreas Lippitz, Jörg F. Friedrich, I. Koprinarov |
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| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Composite Interfaces. 10:139-171 |
| ISSN: | 1568-5543 0927-6440 |
| Popis: | Several approaches were investigated to produce monosort functionalized polymer surfaces with a high density and homogeneity of functional groups: (i) Plasma oxidation followed by wet-chemical reduction, (ii) formation of radicals and grafting on of functional group carrying molecules, (iii) plasma bromination followed by (iv) Williamson or Gabriel-like synthesis of spacer molecules, and (v) a pulsed plasma polymerization of functional groups bearing monomers or (vi) their copolymerisation with other comonomers. The formation of hydroxyl (OH), primary amino (NH2), and carboxyl (COOH) groups was studied in detail. The oxygen plasma treatment (i) in a low-pressure non-isothermal glow discharge results in the formation of a wide variety of O functional groups, polymer degradation and crosslinking. Low power densities and short exposure times (0.1 to 2 s) are required to functionalize a surface while preserving the original polymer structure. Carbonate, ester, and aromatic groups are rapidly degraded by an ox... |
| Databáze: | OpenAIRE |
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