A model for plasma modification of polypropylene using atmospheric pressure discharges
| Autor: | Rajesh Dorai, Mark J. Kushner |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Acoustics and Ultrasonics
Atmospheric pressure Chemistry Radical Inorganic chemistry Kinetics Analytical chemistry Corona treatment Alcohol Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Relative humidity Wetting Deposition (chemistry) |
| Zdroj: | Journal of Physics D: Applied Physics. 36:666-685 |
| ISSN: | 0022-3727 |
| DOI: | 10.1088/0022-3727/36/6/309 |
| Popis: | Atmospheric pressure plasmas are commonly used to improve the wetting and adhesion properties of polymers. In spite of their use, the mechanisms for achieving these properties are unclear. In this regard, we report on a computational investigation of the gas phase and surface kinetics during humid-air corona treatment of polypropylene (PP) and the resulting modification of its surface properties while varying energy deposition, relative humidity (RH), web speed, and gas temperature. Using results from a global plasma chemistry model validated against experiments, we found that increasing energy deposition increased the densities of alcohol, carbonyl, acid, and peroxy radicals on the PP surface. In doing so, significant amounts of gas phase O3 and NxOy are produced. Increasing the RH increased the production of peroxy and acid groups, while decreasing those of alcohol and carbonyl groups. Production of O3 decreased while that of HNO3 increased. Increasing the temperature decreased the concentrations of alcohol, carbonyl, and acid groups on PP while those of the peroxy radicals increased. For a given energy deposition, higher web speeds resulted in decreased concentrations of alcohols, peroxy radicals, carbonyl, and acid groups on PP. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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