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Modern methods of polymers characterisation
Ropek, Lukáš ; Klakurková, Lenka (referee) ; Hutařová, Simona (advisor)
The bachelor thesis consists of an overview of modern methods of polymers testing. The first part deals with historical development, various types and synthesis of polymers. Further work is focused on the structure of polymers, a description of modern sample preparation methods and methods of study the polymers structure. Next, the mechanical properties of polymers and methods of testing the mechanical properties are discussed. Finally, the work is focused on material resistance testing of polymer pipes used in current practice.
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Epoxy resins exposure under severe climatic conditions
Hanačík, Radim ; Rozsívalová, Zdenka (referee) ; Frk, Martin (advisor)
This thesis describes the effects of climatic factors, particularly humidity and temperature on the properties of macromolecular substances, but also others, such as UV radiation, wind, water and oxygen. Furthermore, we introduce the definition and distribution of macromolecular substances. The next section describes the basic properties of dielectric materials. Much of the text is devoted to the description, production, curing, properties and utilization of epoxy resins. The last part deals with climate factors in general terms.
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Design of manufacturing technology for plastic hung
Popelka, Jan ; Kebrle, Ondřej (referee) ; Kandus, Bohumil (advisor)
The aim of my graduation theses is to work up the literature search of polymer processing. To give a short summary of their structure, characteristic and fabrication technique. Then to make a structural design of injection mold for producing the scheduled aim and motivate this design with requisite calculation for construction of the tool, a choice of injection machine and rundown of injection cycle. At the end of my work is this aim economically reviewed and compared with alternative form of structural design.
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Development of multilayer polymer floor systems
Tesař, Filip ; Vyhnánek, Miroslav (referee) ; Petránek, Vít (advisor)
Multilayer polymer flooring systems belongs to widespread materials for industrial constructions and also for public constructions. These are mostly two-components polymeric materials based on epoxy. The main aim of my thesis is to make list of requirements for multilayer polymer flooring system and utilization of waste materials as fillers in polymer epoxy. Then use this knowledge for development of multilayer polymer flooring system and propose the new recipe and primary test´s for this material.
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Estimation of effective material characteristics of polymer composites
Máša, Bohuslav ; Hutař,, Pavel (referee) ; Náhlík, Luboš (advisor)
The bachelor thesis deals with determination of the effective elastic material characteristics of particle reinforced composite with polymer matrix. The first part of the work is devoted to the estimation of the elastic properties on the base of analytical relations found in the literature. The second part is devoted to the numerical modeling of the particle composite using finite element method. Two different polymer matrixes are taken into account and two different compositions in the particles in the matrix were considered. The calculations were performed for wide range of particle volume fraction. The results from both analytical and numerical estimations were compared and useful analytical relation for estimation of effective elastic material properties of given kind of composite has been found.
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Studying the possibility of finishes vibration-pressed products
Mrkvica, Lukáš ; Gajdoš, Jan (referee) ; Hela, Rudolf (advisor)
The aim of this work is to describe the current technology of surface processing with a view to improve durability and aesthetic appearance. The work is described in detail features and coatings polymer materials applied, including curing process. In the practical part is a laboratory examination of the influence of sealing and hydrophobicizing additive properties of concrete and also will be tested concrete surface on the absorbency, grindability loss and color retention, slip resistance and resistance to CHRL.
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Influence of vehicle radiator pressure drop on its aerodynamic drag
Pavlovič, Matúš ; Blaťák, Ondřej (referee) ; Vančura, Jan (advisor)
This diploma thesis focuses on numerical simulation of DrivAer vehicle model with different pressure losses of the radiator. CFD models of the vehicle in Estate body version for individual type of riadiator are created, together with a radiator and a simplified engine compartment. The aim of this work is to compare characteristics of conventional aluminium radiator with characteristics of polymeric prototype radiator and their impact on aerodynamic drag of the vehicle.
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Production of the top of the pressure container
Sobotka, Jiří ; Císařová, Michaela (referee) ; Žák, Ladislav (advisor)
The project developed within the bachelor's degree, proposing a technological parameters of injection molding and tool design for plastic product– segment was suggested from the material PA 6 NOVAMID B30P nature. On the basis of literary study of technological plastic mould injection issues and experiences there was suggested mould injection tool with tunnel inflow, classical extractor was suggested for pressing demoulding. The mould uses standardized components and it corresponds by dimensions with production device ARBURG 420 C 1300-350 (manufacturer ARBURG Gmbh + Co KG, company Loßburg) or ENGEL VICTORY 500/120 Tech (manufacturer Schwertberg, company Schwetberg), with closing force 120 kN or 130 kN. The mould is produced from alloyed tool steel 19 436.9 (POLDI 2002).
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Production of an Injection Mold.
Jílek, Bohumil ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
This thesis is focused on a production of injection molds. It contains some analyses of the various parts of the injection molds, a description of their functions and the possibility of structural design. A summary of existing technologies for the production of these molds, their advantages and disadvantages is included. This thesis deals with design of the component parts for injection of plastics, strategy of machining and a simulation of machining.
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Mechanical Properties of Plastics
Suchý, Marek ; Němec, Karel (referee) ; Molliková, Eva (advisor)
This bachelor thesis deals with the plastics in terms of their internal structures. Analyzes the impact of these characteristics on the resulting mechanical properties of materials. Furthermore, examining the external influences significantly on the polymer chain operates. Concludes two basic methods for the detection of mechanical properties - tensile test and 3-point bend tests.
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