Natural and wood fibre reinforced plastics as a relatively new group of environmental friendly ma... more Natural and wood fibre reinforced plastics as a relatively new group of environmental friendly materials have been extensively applied in interior, building applications and in the automobile industry. Among others, natural and wood fibre reinforced foamed polymer materials are of high significance because of the possibility of their reducing the density of automotive components which have a cellular structure. However, the properties of these materials have not been fully investigated and described. Microcellular composites of polypropylene containing natural and wood fibre was prepared using an injection moulding process. In the present work, the manufacturing technology of natural and wood fibre reinforced polymer microfoams was developed and the influence of fibre and microvoid content on its property spectrum was systematically investigated. The forming of microvoids and the degree of foaming related to the variation of the processing parameters in connection with manufacture technology was characterised. Measurement of density, cell size, tensile and flexural properties of the prepared composites was carried out. The cell structure is dependent on flow direction of foaming. The density of microfoamed wood fibre-PP composites was reduced by about 24% and decreased by as much as 0.77 g/cm3.Light microscopy showed that the cells are circular and it was also observed that the maximum cell sizes are between 10–50 μm. Water absorption and scanning electron microscopy of the composites were also investigated. Considering the experimental results, it can be deduced that the microcellular composites exhibit a possible combination of relatively good engineering properties and lower density for different technical applications. Natur- und holzfaserverstärkte Kunststoffe, als relativ neue Gruppe von umweltfreundlichen Werkstoffen, werden derzeit in beachtlichem Umfang in der Bauindustrie (Dach-, Boden- und Wändeabdeckungen) und Automobilindustrie verwendet. Ausserdem haben natur- und holzfaserverstärkte Polymerwerkstoffe –Mikroschäume, die wegen ihrer zellularen Struktur die Dichte der Bauteile noch reduzieren können, eine immer größere Bedeutung erlangt. Bisher sind die Eigenschaften dieser Werkstoffe nur beschränkt untersucht und beschrieben worden. Natur- und holzfaserverstärkte PP-Mikroschäume wurden im Spritzgießverfahren hergestellt. Im Rahmen der vorliegenden Arbeit wurde die Fertigungstechnik der natur- und holzfaserverstärkten Polymere-Mikroschäume entwickelt und systematisch der Einfluss des Faser-/ und Mikroporengehalts auf das Eigenschaftsspektrum dieser Werkstoffe untersucht. Mikroporen und Schäumungsgrad in Abhängigkeit von der Variation der Verarbeitungsparameter wurden in Verbindung mit dem Herstellungsprozess charakterisiert. Die Dichte, die Zellgröße, die Zug- und Biegeparameter der hergestellten Compositen wurden ermittelt. Die Schaumstruktur ist vom Fließweg abhängig. Die Dichte von geschäumten holzfaserverstärkten PP kann bis ca. 24% reduziert werden und erreicht Werte von 0,77 g/cm3. Die mikroskopischen Aufnahmen zeigen, dass die Mikroporen eine runde Struktur aufweisen, und der Porendurchmesser zwichen 10–50 μm liegt. Die Wasseraufnahme wurde ebenfalls untersucht. Die erzielten Ergebnisse belegen, dass diese Werkstoffe für verschidene Anwendungen in der Technik geeignet sind.
ABSTRACT: Microcellular wood fiber reinforced PP composites, a new development using bio-fiber st... more ABSTRACT: Microcellular wood fiber reinforced PP composites, a new development using bio-fiber strengthened plastic, are prepared in an injection molding process. The microcellular composites with five different types of wood fibers (hard wood fiber, finer hard wood fiber, ...
ABSTRACT: Microcellular wood fiber reinforced PP composites, a new development using bio-fiber st... more ABSTRACT: Microcellular wood fiber reinforced PP composites, a new development using bio-fiber strengthened plastic, are prepared in an injection molding process. The microcellular composites with five different types of wood fibers (hard wood fiber, finer hard wood fiber, ...
ABSTRACT: Microcellular wood fiber reinforced PP composites, a new development using bio-fiber st... more ABSTRACT: Microcellular wood fiber reinforced PP composites, a new development using bio-fiber strengthened plastic, are prepared in an injection molding process. The microcellular composites with five different types of wood fibers (hard wood fiber, finer hard wood fiber, ...
This study was aimed at identifying the best approach of incorporating nanoclay into wood-plastic... more This study was aimed at identifying the best approach of incorporating nanoclay into wood-plastic composites (WPCs) to enhance their mechanical properties. Two different methods of introducing nanoclays into HDPE-based WPCs were examined. The first method involved the ...
... Andrzej K. Bledzki a * & Omar Faruk a pages 871-888. ... Compounding ... more ... Andrzej K. Bledzki a * & Omar Faruk a pages 871-888. ... Compounding wood flour together with polypropylene can afford an attractive combination of high specific stiffness and strength, less abrasion during processing, low density, and low price with respect to mineral fillers. ...
ABSTRACT: This article presents the investigations on the cell morphology, surface roughness, imp... more ABSTRACT: This article presents the investigations on the cell morphology, surface roughness, impact properties, and odor concentration of microcellular wood fiber reinforced PP composites in injection molding process with different chemical foaming agents. The ...
... PPT-120004361 Andrzej K. Bledzki a * , Omar Faruk a & Monimul Huque b pag... more ... PPT-120004361 Andrzej K. Bledzki a * , Omar Faruk a & Monimul Huque b pages 435-451. ... However, the value of the 10% coupling agent remains nearly the same with change of wood fiber content. From this it can be said that MAH-PP is more effective at lower percentage. ...
Wood fibre reinforced polypropylene composites at fibre content 50% by weight have been prepared ... more Wood fibre reinforced polypropylene composites at fibre content 50% by weight have been prepared and different types of wood fibres (hard wood fibre, soft wood fibre, long wood fibre and wood chips) were treated with coupling agent (MAH-PP) to increase the interfacial adhesion with the matrix to improve the dispersion of the particles and to decrease the water sorption properties of the final composite. The present study investigated the tensile, flexural, charpy impact and impact properties of wood fibre reinforced polypropylene composites as a function of coupling agent and fibre length and structure. From the results it is observed that wood chips-PP composites showed better tensile and flexural properties comparative with the other wood fibre-PP composites with the addition of 5%MAH-PP, which is around 65% and 50% for tensile strength and flexural strength respectively. Hard wood fibre-PP composites showed better impact characteristic values comparative to other wood fibre-PP composites with the addition of 5%MAH-PP and damping index decreased about to 60%. Charpy impact strength also increased up to 60% with the addition of 5%MAH-PP for long wood fibre-PP composites. Water absorption and scanning electron microscopy of the composites are also investigated.
ABSTRACT: Microcellular wood fiber reinforced PP composites, a new development using bio-fiber st... more ABSTRACT: Microcellular wood fiber reinforced PP composites, a new development using bio-fiber strengthened plastic, are prepared in an injection molding process. The microcellular composites with five different types of wood fibers (hard wood fiber, finer hard wood fiber, ...
Wood fibre reinforced polypropylene composites of different fibre content (40, 50 and 60% by weig... more Wood fibre reinforced polypropylene composites of different fibre content (40, 50 and 60% by weight) have been prepared and wood fibres (hard and long fibre) were treated with compatibiliser (MAH-PP) to increase the interfacial adhesion with the matrix to improve the dispersion of ...
Natural and wood fibre reinforced plastics as a relatively new group of environmental friendly ma... more Natural and wood fibre reinforced plastics as a relatively new group of environmental friendly materials have been extensively applied in interior, building applications and in the automobile industry. Among others, natural and wood fibre reinforced foamed polymer materials are of high significance because of the possibility of their reducing the density of automotive components which have a cellular structure. However, the properties of these materials have not been fully investigated and described. Microcellular composites of polypropylene containing natural and wood fibre was prepared using an injection moulding process. In the present work, the manufacturing technology of natural and wood fibre reinforced polymer microfoams was developed and the influence of fibre and microvoid content on its property spectrum was systematically investigated. The forming of microvoids and the degree of foaming related to the variation of the processing parameters in connection with manufacture technology was characterised. Measurement of density, cell size, tensile and flexural properties of the prepared composites was carried out. The cell structure is dependent on flow direction of foaming. The density of microfoamed wood fibre-PP composites was reduced by about 24% and decreased by as much as 0.77 g/cm3.Light microscopy showed that the cells are circular and it was also observed that the maximum cell sizes are between 10–50 μm. Water absorption and scanning electron microscopy of the composites were also investigated. Considering the experimental results, it can be deduced that the microcellular composites exhibit a possible combination of relatively good engineering properties and lower density for different technical applications. Natur- und holzfaserverstärkte Kunststoffe, als relativ neue Gruppe von umweltfreundlichen Werkstoffen, werden derzeit in beachtlichem Umfang in der Bauindustrie (Dach-, Boden- und Wändeabdeckungen) und Automobilindustrie verwendet. Ausserdem haben natur- und holzfaserverstärkte Polymerwerkstoffe –Mikroschäume, die wegen ihrer zellularen Struktur die Dichte der Bauteile noch reduzieren können, eine immer größere Bedeutung erlangt. Bisher sind die Eigenschaften dieser Werkstoffe nur beschränkt untersucht und beschrieben worden. Natur- und holzfaserverstärkte PP-Mikroschäume wurden im Spritzgießverfahren hergestellt. Im Rahmen der vorliegenden Arbeit wurde die Fertigungstechnik der natur- und holzfaserverstärkten Polymere-Mikroschäume entwickelt und systematisch der Einfluss des Faser-/ und Mikroporengehalts auf das Eigenschaftsspektrum dieser Werkstoffe untersucht. Mikroporen und Schäumungsgrad in Abhängigkeit von der Variation der Verarbeitungsparameter wurden in Verbindung mit dem Herstellungsprozess charakterisiert. Die Dichte, die Zellgröße, die Zug- und Biegeparameter der hergestellten Compositen wurden ermittelt. Die Schaumstruktur ist vom Fließweg abhängig. Die Dichte von geschäumten holzfaserverstärkten PP kann bis ca. 24% reduziert werden und erreicht Werte von 0,77 g/cm3. Die mikroskopischen Aufnahmen zeigen, dass die Mikroporen eine runde Struktur aufweisen, und der Porendurchmesser zwichen 10–50 μm liegt. Die Wasseraufnahme wurde ebenfalls untersucht. Die erzielten Ergebnisse belegen, dass diese Werkstoffe für verschidene Anwendungen in der Technik geeignet sind.
ABSTRACT: Microcellular wood fiber reinforced PP composites, a new development using bio-fiber st... more ABSTRACT: Microcellular wood fiber reinforced PP composites, a new development using bio-fiber strengthened plastic, are prepared in an injection molding process. The microcellular composites with five different types of wood fibers (hard wood fiber, finer hard wood fiber, ...
ABSTRACT: Microcellular wood fiber reinforced PP composites, a new development using bio-fiber st... more ABSTRACT: Microcellular wood fiber reinforced PP composites, a new development using bio-fiber strengthened plastic, are prepared in an injection molding process. The microcellular composites with five different types of wood fibers (hard wood fiber, finer hard wood fiber, ...
ABSTRACT: Microcellular wood fiber reinforced PP composites, a new development using bio-fiber st... more ABSTRACT: Microcellular wood fiber reinforced PP composites, a new development using bio-fiber strengthened plastic, are prepared in an injection molding process. The microcellular composites with five different types of wood fibers (hard wood fiber, finer hard wood fiber, ...
This study was aimed at identifying the best approach of incorporating nanoclay into wood-plastic... more This study was aimed at identifying the best approach of incorporating nanoclay into wood-plastic composites (WPCs) to enhance their mechanical properties. Two different methods of introducing nanoclays into HDPE-based WPCs were examined. The first method involved the ...
... Andrzej K. Bledzki a * & Omar Faruk a pages 871-888. ... Compounding ... more ... Andrzej K. Bledzki a * & Omar Faruk a pages 871-888. ... Compounding wood flour together with polypropylene can afford an attractive combination of high specific stiffness and strength, less abrasion during processing, low density, and low price with respect to mineral fillers. ...
ABSTRACT: This article presents the investigations on the cell morphology, surface roughness, imp... more ABSTRACT: This article presents the investigations on the cell morphology, surface roughness, impact properties, and odor concentration of microcellular wood fiber reinforced PP composites in injection molding process with different chemical foaming agents. The ...
... PPT-120004361 Andrzej K. Bledzki a * , Omar Faruk a & Monimul Huque b pag... more ... PPT-120004361 Andrzej K. Bledzki a * , Omar Faruk a & Monimul Huque b pages 435-451. ... However, the value of the 10% coupling agent remains nearly the same with change of wood fiber content. From this it can be said that MAH-PP is more effective at lower percentage. ...
Wood fibre reinforced polypropylene composites at fibre content 50% by weight have been prepared ... more Wood fibre reinforced polypropylene composites at fibre content 50% by weight have been prepared and different types of wood fibres (hard wood fibre, soft wood fibre, long wood fibre and wood chips) were treated with coupling agent (MAH-PP) to increase the interfacial adhesion with the matrix to improve the dispersion of the particles and to decrease the water sorption properties of the final composite. The present study investigated the tensile, flexural, charpy impact and impact properties of wood fibre reinforced polypropylene composites as a function of coupling agent and fibre length and structure. From the results it is observed that wood chips-PP composites showed better tensile and flexural properties comparative with the other wood fibre-PP composites with the addition of 5%MAH-PP, which is around 65% and 50% for tensile strength and flexural strength respectively. Hard wood fibre-PP composites showed better impact characteristic values comparative to other wood fibre-PP composites with the addition of 5%MAH-PP and damping index decreased about to 60%. Charpy impact strength also increased up to 60% with the addition of 5%MAH-PP for long wood fibre-PP composites. Water absorption and scanning electron microscopy of the composites are also investigated.
ABSTRACT: Microcellular wood fiber reinforced PP composites, a new development using bio-fiber st... more ABSTRACT: Microcellular wood fiber reinforced PP composites, a new development using bio-fiber strengthened plastic, are prepared in an injection molding process. The microcellular composites with five different types of wood fibers (hard wood fiber, finer hard wood fiber, ...
Wood fibre reinforced polypropylene composites of different fibre content (40, 50 and 60% by weig... more Wood fibre reinforced polypropylene composites of different fibre content (40, 50 and 60% by weight) have been prepared and wood fibres (hard and long fibre) were treated with compatibiliser (MAH-PP) to increase the interfacial adhesion with the matrix to improve the dispersion of ...
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