Cílem této diplomové práce je studium vlastností kompozitů polypropylenu s dřevní moučkou. Bylo použito pět typů dřevní moučky; přírodní neupravená dřevní moučka a čtyři teplotně upravované (retifikované) dřevní moučky. Vlastnosti vzorků byly zkoumány reologickými měřeními, diferenciální skenovací kalorimetrií, rentgenovou difrakcí, tahovými zkouškami, termogravimetrickou analýzou, skenovací elektronovou mikroskopií a dynamicko-mechanickou analýzou. Bylo zjištěno, že tepelná úprava topolového dřeva za určitých podmínek, může vést ke zlepšení interakce mezi polypropylenem a dřevem, což bylo demonstrováno změnami v krystalizaci a v mechanických vlastnostech materiálů.
Annotation in English
The aim of this thesis is to study the properties of polypropylene/wood flour composites. Five types of wood flour were used as filler for polypropylene; untreated wood flour and four thermally treated (retified) wood flours. The properties of samples were investigated by rheology measurements, differential scanning calorimetry, wide-angle X-ray diffraction, tensile testing, thermogravimetric analysis, scanning electron microscopy and dynamic mechanical analysis. It was found that the thermal treatment of poplar wood flour under given conditions can lead to the improvement of the polypropylene/wood interaction which was demonstrated by the changes in crystallization and mechanical properties of the materials.
Keywords
polypropylen, dřevní moučka, retifikace, kompozity polypropylenu s dřevní moučkou
Cílem této diplomové práce je studium vlastností kompozitů polypropylenu s dřevní moučkou. Bylo použito pět typů dřevní moučky; přírodní neupravená dřevní moučka a čtyři teplotně upravované (retifikované) dřevní moučky. Vlastnosti vzorků byly zkoumány reologickými měřeními, diferenciální skenovací kalorimetrií, rentgenovou difrakcí, tahovými zkouškami, termogravimetrickou analýzou, skenovací elektronovou mikroskopií a dynamicko-mechanickou analýzou. Bylo zjištěno, že tepelná úprava topolového dřeva za určitých podmínek, může vést ke zlepšení interakce mezi polypropylenem a dřevem, což bylo demonstrováno změnami v krystalizaci a v mechanických vlastnostech materiálů.
Annotation in English
The aim of this thesis is to study the properties of polypropylene/wood flour composites. Five types of wood flour were used as filler for polypropylene; untreated wood flour and four thermally treated (retified) wood flours. The properties of samples were investigated by rheology measurements, differential scanning calorimetry, wide-angle X-ray diffraction, tensile testing, thermogravimetric analysis, scanning electron microscopy and dynamic mechanical analysis. It was found that the thermal treatment of poplar wood flour under given conditions can lead to the improvement of the polypropylene/wood interaction which was demonstrated by the changes in crystallization and mechanical properties of the materials.
Keywords
polypropylen, dřevní moučka, retifikace, kompozity polypropylenu s dřevní moučkou
The aim of the thesis is to prepare the composites based on wood flour and polypropylene and evaluate their final properties. Composites will be prepared via twin screw extrusion. Several ratios of wood/polypropylene and processing conditions will be applied. Both neat and thermally modified wood flour will be employed as a filler. Special attention will be paid to mechanical properties of processed composites.
Research Plan
The aim of the thesis is to prepare the composites based on wood flour and polypropylene and evaluate their final properties. Composites will be prepared via twin screw extrusion. Several ratios of wood/polypropylene and processing conditions will be applied. Both neat and thermally modified wood flour will be employed as a filler. Special attention will be paid to mechanical properties of processed composites.
Recommended resources
1. Ichazo, M.N., et al. PP/wood flour composites: treatments and properties. Composite structures. 2001, no. 54, p. 207-214 2. Dányádí, L., et al. Wood flour filled PP composites : Compatibilization and adhesion. Composites science and technology. 2007, no. 67, p. 2838-2846 3. Kim, Jae-Woo, et al. Effect of Wood Species on the Mechanical and Thermal Properties of Wood-Plastic Composites. Wiley InterScience. 2009, no. 112, s. 1378-1385 4. Azizi, H., et al. Investigation on the Dynamic Melt Rheological Properties of Polypropylene/Wood Flour Composites. Wiley InterScience. 2009, no. 115, s. 429-435 5. Dányádi, L., et al. Effect of various surface modifications of wood
flour on the properties of pp/wood composites, Composites: Part A (2009), doi: 10.1016/j.compositesa.2009.10.008 6. Surface modification of wood flour and its effect on the properties of PP/wood composites. Composites. 2007, no. 38, s. 1893-1901
Recommended resources
1. Ichazo, M.N., et al. PP/wood flour composites: treatments and properties. Composite structures. 2001, no. 54, p. 207-214 2. Dányádí, L., et al. Wood flour filled PP composites : Compatibilization and adhesion. Composites science and technology. 2007, no. 67, p. 2838-2846 3. Kim, Jae-Woo, et al. Effect of Wood Species on the Mechanical and Thermal Properties of Wood-Plastic Composites. Wiley InterScience. 2009, no. 112, s. 1378-1385 4. Azizi, H., et al. Investigation on the Dynamic Melt Rheological Properties of Polypropylene/Wood Flour Composites. Wiley InterScience. 2009, no. 115, s. 429-435 5. Dányádi, L., et al. Effect of various surface modifications of wood
flour on the properties of pp/wood composites, Composites: Part A (2009), doi: 10.1016/j.compositesa.2009.10.008 6. Surface modification of wood flour and its effect on the properties of PP/wood composites. Composites. 2007, no. 38, s. 1893-1901
