MODELING OF THE SURFACE OXIDATION OF FLAME-TREATED POLYPROPYLENE FILM

Detailed numerical modeling of the surface oxidation of polypropylene (PP) films was performed to define the reactions contributing to the oxidation of the film. The surface reaction mechanism developed by Dorai and Kushner provided the basic framework for the chemistry used in the model. The calcul...

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Bibliographic Details
Published in:Combustion science and technology 2007-10, Vol.179 (10), p.2091-2105
Main Authors: STROUD, COLLEEN, BRANCH, MELVYN C.
Format: Article
Language:English
Subjects:
Applied sciences
Combustion. Flame
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Flame treatment
Surface modification
Surface oxidation mechanism
Theoretical studies
Theoretical studies. Data and constants. Metering
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Summary:Detailed numerical modeling of the surface oxidation of polypropylene (PP) films was performed to define the reactions contributing to the oxidation of the film. The surface reaction mechanism developed by Dorai and Kushner provided the basic framework for the chemistry used in the model. The calculated results correlate well with available experimental data on PP surface atomic oxygen to carbon ratios and provide insight into the pathways of polymer surface oxidation. The results show that O 2 and OH play major roles in the modification of the surface and that the rate limiting step is the abstraction of hydrogen by the hydroxyl radical. As the flame equivalence ratio changes, the dominant surface functional groups change from the peroxy group under lean conditions, to a combined contribution of the peroxy, alkoxy, and hydroxyl groups at stoichiometric, to the hydroxyl surface species alone under fuel-rich conditions.
ISSN:0010-2202
1563-521X
DOI:10.1080/00102200701386131