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Energy Chains
Oríšek, Petr ; Němec, Karel (referee) ; Molliková, Eva (advisor)
The thesis points to the importance of energy chains in the engineering practice and the wide range of their usage. The elaboration of this topic includes presentation of various types of energy chains, information about their construction, application and history. The emphasis is put on defining the properties that the chosen material must have in order to meet all requirements for energy chain. The thesis provides general information about the materials suitable for production of the chains and their properties and presents concrete materials used in the practice. Furthermore, a part of the work is dedicated to flexible cables which are inserted to the energy chains and their properties. There is a number of companies producing energy chains worldwide. The thesis makes use of the information furnished by one of these companies.
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Engineering plastics for specific applications
Vrátný, Martin ; Kebrle, Ondřej (referee) ; Kandus, Bohumil (advisor)
This bachelor’s thesis is focused on heat resistance and chemical resistance of plastics. The first part deals with properties and usage of selected plastics. The second part includes description of heat resistance and chemical resistance. Selected plastics are compared in table by their resistance. In conclusion the plastics are compared by detected data and suitability of plastics in environment with higher temperatures and aggresive chemical impacts.
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Testing of polymeric materials under climatic conditions of Antarctica
Mičkal, Petr ; Sluková, Michaela (referee) ; Krmíček, Lukáš (advisor)
The bachelor's thesis generally deals with polymer materials and evaluates the possibility of testing their resistance to extreme climates of Antarctica. Described herein are various polymer materials, their characteristics, structure, properties and more thorough and detailed descriptions of selected polymers. The next section describes the basic types of degradation these polymers are exposed to, when facing the extreme conditions of the Antarctic climate. The practical part contains evaluations of tests made on the degraded polymer materials that were collected in Antarctica during the southern Antarctic season of 2013-2014 by Ing. Bc. Pavel Kapler, Ph.D, who is a superintendent at the Czech scientific station JG Mendel.
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Clay minerals in polymeric materials
Zaťko, Petr ; Sluková, Michaela (referee) ; Krmíček, Lukáš (advisor)
The bachelor thesis deals with the clay minerals as fillers in polymer materials and their polymer/clay nanocomposites. The thesis brings an introduction to the structure of polymers and clay minerals and their application in polymer materials. The practical part of the thesis deals with testing the diffusivity of CO2 through the film made of recycled polyvinyl butyral with fillers Nanofil®5, Dellite® 67 and Cloisite® 93A and their comparison with reference samples from recycled PVB without added fillers and commercial films of extruded PVB.
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Study of biocompatible polymers degradation
Oborná, Jana ; Márová, Ivana (referee) ; Vávrová, Milada (advisor)
This bachelor thesis is focused on biocompatible polymers degradation study. Both poly(D,L-lactic-co-glycolic acid)-g-polyethyleneglycol-g-poly(D,L-lactic-co-glycolic acid) copolymers and their forms modified with itaconic acid were monitored. This work verified the optimal analytical procedure for monitoring the degradation of investigated copolymers. Bio-degradation of polymers occured at 37 °C in phosphate buffer with pH=7.4. High performance liquid chromatography with UV-VIS detection of diode-array type was used for determation of the degradation products. Gel permeation chromatography with refractive index detector was used for the assesment of the change of molecular weight polymer chain after the degradation.
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SMV-2012-19: Topography of thin polymer films
Urbánek, Michal
Topography measurement and properties' evaluation of thin polymer films deposited on silicon and quartz glass substrates. Measurements were carried out by atomic force microscopy (AFM)in contact mode. The roughness of polymer films were determined. Simultaneously analysis of individual phases in polymers was done by measurement of lateral forces.
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