DEGRADATION OF POLYPROPYLENE IN NATURALLY AND ARTIFICIALLY WEATHERED PLASTIC MATRIX COMPOSITES
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| Format: | Artículo científico |
| Language: | en |
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Universidad del Bío Bío
2014
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| _version_ | 1876457175989092352 |
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| author | James S. Fabiyi |
| author_facet | James S. Fabiyi |
| contents | DEGRADATION OF POLYPROPYLENE IN NATURALLY AND ARTIFICIALLY WEATHERED PLASTIC MATRIX COMPOSITES James S. Fabiyi Armando G. McDonald Agrociencias weathering Crystallinity polypropylene wood plastic composites molecular weight distribution Effects of accelerated and natural weathering on the molecular weight distribution (MWD) and crystallinity of polypropylene (PP) in wood plastic composites (WPC) were investigated. The composites were produced from pine fibers (60%) and PP (40%). Prolonged weathering caused an increase in wood degradation and erosion thereby leaving cracks and ‘‘pits’’ on the surface. Pyrolysis gas chromatography-mass spectrometry (Py GC-MS) revealed that PP dominated the weathered surface due to wood degradation. For matrix analysis, PP was extracted using 1,2,4-trichlorobenzene. Crystallinity and molecular weight distribution of PP were monitored by differential scanning calorimetry (DSC) and gel permeation chromatography (GPC), respectively. PP’s crystallinity increased upon longer exposure time. The weight and number average molecular weight (Mw and Mn) decreased with an increase in weathering duration. An increased polydispersity (PD = Mw/Mn) implies that a secondary cross linking process occurred during weathering. 2014 artículo científico 0717-3644 https://www.redalyc.org/articulo.oa?id=48531481002 en http://www.redalyc.org/revista.oa?id=485 Maderas. Ciencia y Tecnología application/pdf Universidad del Bío Bío Maderas. Ciencia y Tecnología (Chile) Num.3 Vol.16 |
| format | Artículo científico |
| id | redalyc_48531481002 |
| institution | Redalyc |
| language | en |
| publishDate | 2014 |
| publisher | Universidad del Bío Bío |
| spellingShingle | DEGRADATION OF POLYPROPYLENE IN NATURALLY AND ARTIFICIALLY WEATHERED PLASTIC MATRIX COMPOSITES James S. Fabiyi Agrociencias weathering Crystallinity polypropylene wood plastic composites molecular weight distribution DEGRADATION OF POLYPROPYLENE IN NATURALLY AND ARTIFICIALLY WEATHERED PLASTIC MATRIX COMPOSITES James S. Fabiyi Armando G. McDonald Agrociencias weathering Crystallinity polypropylene wood plastic composites molecular weight distribution Effects of accelerated and natural weathering on the molecular weight distribution (MWD) and crystallinity of polypropylene (PP) in wood plastic composites (WPC) were investigated. The composites were produced from pine fibers (60%) and PP (40%). Prolonged weathering caused an increase in wood degradation and erosion thereby leaving cracks and ‘‘pits’’ on the surface. Pyrolysis gas chromatography-mass spectrometry (Py GC-MS) revealed that PP dominated the weathered surface due to wood degradation. For matrix analysis, PP was extracted using 1,2,4-trichlorobenzene. Crystallinity and molecular weight distribution of PP were monitored by differential scanning calorimetry (DSC) and gel permeation chromatography (GPC), respectively. PP’s crystallinity increased upon longer exposure time. The weight and number average molecular weight (Mw and Mn) decreased with an increase in weathering duration. An increased polydispersity (PD = Mw/Mn) implies that a secondary cross linking process occurred during weathering. 2014 artículo científico 0717-3644 https://www.redalyc.org/articulo.oa?id=48531481002 en http://www.redalyc.org/revista.oa?id=485 Maderas. Ciencia y Tecnología application/pdf Universidad del Bío Bío Maderas. Ciencia y Tecnología (Chile) Num.3 Vol.16 |
| title | DEGRADATION OF POLYPROPYLENE IN NATURALLY AND ARTIFICIALLY WEATHERED PLASTIC MATRIX COMPOSITES |
| topic | Agrociencias weathering Crystallinity polypropylene wood plastic composites molecular weight distribution |
| url | https://www.redalyc.org/articulo.oa?id=48531481002 |