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National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
Structure and properties of physically foamed polymer nanocomposites
 Kotoučková, Simona ; Ondreáš, František (referee) ; Lepcio, Petr (advisor)
This work deals with physically foamed polymer nanocomposites. The theoretical part of the thesis deals with various possibilities of preparation of polymer foams. Another important problematics on which the theoretical part focuses is the ability to control the spatial organization of nanoparticles in a polymer matrix. For the experimental part, polymethyl methacrylate (PMMA) was used as a model system, and it is assumed that it will be possible to based on the obtained conclusions on research in more complicated systems with a wider practical application potential such as polypropylene impact-copolymer (ICPP). The experimental part focuses on optimalization of the process of preparing nanocomposite foam. The object of optimization is to determine the appropriate saturation time when maximum carbon dioxide saturation is achieved under a given pressure. The effect of nanoparticles on the process of saturation and foaming was analyzed by comparing nanocomposites with the preparation of pure polymer foams. On the prepared foam samples, the shape stability during foaming and the dimensional stability after foaming at elevated temperature were evaluated. The effect of nanoparticles on the resulting structure of porous material was evaluated. This effect was demonstrated by the preparation and evaluation of acquired SEM images of a laminar structure sample containing a composite and a pure polymer layer.
Detailed record
Structure and properties of physically foamed polymer nanocomposites
 Kotoučková, Simona ; Ondreáš, František (referee) ; Lepcio, Petr (advisor)
This work deals with physically foamed polymer nanocomposites. The theoretical part of the thesis deals with various possibilities of preparation of polymer foams. Another important problematics on which the theoretical part focuses is the ability to control the spatial organization of nanoparticles in a polymer matrix. For the experimental part, polymethyl methacrylate (PMMA) was used as a model system, and it is assumed that it will be possible to based on the obtained conclusions on research in more complicated systems with a wider practical application potential such as polypropylene impact-copolymer (ICPP). The experimental part focuses on optimalization of the process of preparing nanocomposite foam. The object of optimization is to determine the appropriate saturation time when maximum carbon dioxide saturation is achieved under a given pressure. The effect of nanoparticles on the process of saturation and foaming was analyzed by comparing nanocomposites with the preparation of pure polymer foams. On the prepared foam samples, the shape stability during foaming and the dimensional stability after foaming at elevated temperature were evaluated. The effect of nanoparticles on the resulting structure of porous material was evaluated. This effect was demonstrated by the preparation and evaluation of acquired SEM images of a laminar structure sample containing a composite and a pure polymer layer.
Detailed record
Studium vlastností lepeného spoje PUR-pěny a podkladového materiálu u čalouněného sedacího nábytku
 Pacovský, Josef
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