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Long-term tests for examination of surface treatments in various adverse environments simulating real effects
Hudečková, Petra ; Vacula, Miroslav (referee) ; Bydžovský, Jiří (advisor)
Cement bonded particleboards contain organic base and as they are set outside, extreme weather condition, such as frost, chemical defrosting substances or sulphates, cause their degradation. The presence of the organic base in the matrix of the material could be the reason why there is higher probability of degrading when compared with materials containing an inorganic base. It could be partially eliminated by an appropriate surface modification of the slab, which main goal is to weaken the impact of an aggressive environment and to extend the lifespan of the board. On the other hand, the surface modifications based on a polymer base are prone to degrade because of other unfavourable conditions such as UV radiation when compared with the cement bonded particleboard. The classification of the surface modifications and the way of their degradation caused by the aggressive environment in real applications are presented in the theoretical part of the thesis. In the experimental part, appropriate methodical ways of testing the resistance of cement bonded particleboard’s coating system were chosen. Then, the testing and comparing of the physical, mechanical and aesthetic properties of different types of coatings were done. Moreover, a spectrophotometric analysis of the colour shade changes for the different aggressive environment were carried out. Furthermore, microstructures of chosen surface modifications were assessed by using an optical and an electron microscope.
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Flame retarders of polymeric materials
Winkler, David ; Poláček, Petr (referee) ; Kučera, František (advisor)
Bachelor thesis focuses on the study of expanded graphite as flame retardant added to low density polyethylene and it´s potential synergistic effect with ammonium polyphosphate. Additive and non-additive dog-bone samples were prepared by compounding and injection. Crystalization, melting point and thermal decomposition of the samples were monitored by TGA and DSC thermal analysis methods. The effect of expanded graphite on the mechanical proporties of the materiál was monitored by a tenssile test. The effect of expanded graphite as a flame retardant and its synergistic effect with ammonium polyphosphate was confirmed by a flame test in the horizontal position of the sample.
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Assessing the Synergistic Effects of the Selected Consolidated Entity
Babáčková, Markéta ; Kubovic, Pavel (referee) ; Rajchlová, Jaroslava (advisor)
The thesis focuses on the methods of assessment of synergies established in a consolidated entity. The text includes a definition of a consolidated unit based on theoretical grounds and a draft set of indicators suitable for the analysis of the achievement of synergies. Synergies are monitored through a comparison between the consolidated unit and the mother company made in several selected areas. Results of the analysis of the draft indicators are assessed to determine whether synergies were achieved.
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Assessing the Synergistic Effects of the Selected Consolidated Entity
Hájková, Jana ; Kubovic, Pavel (referee) ; Rajchlová, Jaroslava (advisor)
This diploma thesis is aimed at assessing the existence of synergistic effects of the selected consolidated entities in the Czech Republic. Using specific financial metrics, the objective of this thesis is to identify the synergistic effects which occur among five consolidated entities operating in the area of property. Measurement and evaluation are performed pursuant to analysis of financial statements as well as qualitative data and are supposed to lead to assessing the existence of synergy in given sphere of national economy.
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