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Authors
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Pötschke, P. ; Krause, B. ; Stange, J. ; Münstedt, H.
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Title
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Elongational viscosity and foaming behavior of PP modified by electron irradiation or nanotube addition
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Date
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15.08.2007
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Number
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15053
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Abstract
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In this study, two different routes were chosen which are expected to influence the elongational viscosity and, thus, the foaming behavior of polypropylene (PP). Electron irradiation of a linear PP was performed at room temperature using different doses. Enhanced long-chain branching was observed with increased irradiation dose. In addition, a linear PP was filled with 5 wt% multiwalled carbon nanotubes (MWNT) by melt mixing at 200 °C. These modified PP materials were investigated with respect to their shear and elongational behavior. After foaming, irradiated PP led to an expansion factor which is about 60% higher than that of the non-irradiated product. In case of PP filled with 5 wt% MWNT the value of the expansion factor is about 70% higher than that of pure PP expanded under the same conditions. The cell structure is much finer in both cases as compared to unmodified PP.
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Publisher
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Macromolecular Symposia
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Wikidata
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Citation
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Macromolecular Symposia 254 (2007) 400-408
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DOI
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https://doi.org/10.1002/masy.200750858
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Tags
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