National Repository of Grey Literature 10 records found  Search took 0.00 seconds. 
A comparison of different types of epoxy adhesives
Mihulka, Jan ; Žák, Ladislav (referee) ; Kubíček, Jaroslav (advisor)
This thesis is focused on a bonding technology. The first part describes the theory of the bonding and it is discussed the main areas of this technology. The experimental part deals with the comparison of four two-component epoxy adhesives in terms of shear strength. For the experiment it had been selected adhesives: Bison Epoxy Universal, Pattex Repair Epoxy Ultra Strong 5 min, Ergo 7430 and Letoxit LH 232. After performing the experiment, it was shown that Bison Epoxy Universal and Pattex Repair Epoxy Ultra Strong 5 min achieved the strengths stated in the datasheet. The strengths of Ergo 7430 and Letoxit LH 232 adhesives was lower than stated in their technological products, thefore, did not meet our expectations. The reason for not achieving the declared strength was probably poor dosing or insufficient mixing of ingredients.
FRP for concrete reinforcement
Blahová, Aneta ; Vaněrek, Jan (referee) ; Bodnárová, Lenka (advisor)
The bachelor thesis deals with composite polymer FRP reinforcement. It descibes the method of manufacturing FRP reinforcements, which are their properties and what materials are used by manufacturers. Lists FRP reinforcement application in various structures. Also mentions the durability of FRP reinforcement in an aggressive environment and the cohesiveness of FRP reinforcement with concrete. The conclusion of the work is a proposal for experimental testing of a bond between FRP reinforcement and concrete.
The diploma thesis was prepared in cooperation with Atemit. The thesis describes the specific composition and properties of polymer industrial substrates from Atemit research.
Šácha, Dominik ; Tesařík, Miroslav (referee) ; Bodnárová, Lenka (advisor)
This diploma thesis has goal to find out possibility of substitution sand in polymer crete flooring system by recycling car glass. Polymer crete is made from sand and epoxy resin. Companies use it in industrial flooring system. Polymercrete industrial flooring systems are new types of floor surface. It aims to customers with high requirements to floor properties and short time of realisation. Polymercrete floors are 4-6 mm thin. They are waterproof, they has higher compressive strength then 60 MPa and tensile strength is more than 20 MPa. Polymercretes does not make dust. This study includes also suggestion of recycling process to make glass sand from car glass windows. The diploma thesis was prepared in cooperation with company Atemit, s.r.o.
Testing of potting compounds for electrical machines
Chudá, Kateřina ; Veselka, František (referee) ; Huzlík, Rostislav (advisor)
Potting compounds are used in electrotechnics to protect electric machines from the adverse effect, to improve insulating properties and to better heat transferthat is created in machine during their using. Embedding electronics into encapsulants can be used in wet, dusty or other environment, where normally it cannot be used properly.
Polymer protective systems for concrete floors
Novotná, Adéla ; Vyhnánek, Miroslav (referee) ; Petránek, Vít (advisor)
The thesis is addressing the testing of protective polymer layers, which are used mainly for industrial floors. A summary table of standards is presented, dividing the test carried out on the binders, fillers, fresh mixture and polymerized material. Non standardize tests are described in detail in a very similar way as it is performed by the Institute of Technology of Building Materials and Components. The second part of my thesis is devoted to testing of the reference material and material filled with raw substances. Based on recommendations of Lena Chemical Company, filler – ground windscreen glass will be used. On this type of mixture selected set of tests needed for construction and technical certificates was performed.
Potting Compounds for Power Electronics
Štajner, David ; Červinka, Dalibor (referee) ; Vašíček, Adam (advisor)
Potting compounds are often used in electrotechnics to protect the electronics from the adverse effects, improves its insulating properties and helps to improve the heat transfer from the embedded devices in the surroundings. Embedding electronics into encapsulants extend the field of application. Such electronics can then be used in wet, dusty, corrosive or otherwise harsh environments.
New Possibilities of Utilization of Silicate Secondary Raw Materials in Multi-layer Floor Systems
Novotná, Adéla ; Skuda,, Ladislav (referee) ; Petránek, Vít (advisor)
The theoretical part of the thesis deals with the multi-layer polymer flooring systems green products, where main focus is placed on recycled material fillers. The practical part is devoted to reference materials practical testing and also to testing of materials filled by secondary materials silicates with the conclusive tests support. The economic part should point out the advantages of the secondary raw materials use in terms of the final product lower price.
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.
Dielectric Properties of Epoxy with Ground Mica
Bednář, Pavel ; Polsterová, Helena (referee) ; Havlíček, Svatopluk (advisor)
This thesis deals with the dielectric relaxation spectroscopy applied to samples of an epoxy slip filled by grounded mica with granularity of 40 m. The changes of dielectric properties were investigated depending on the fulfillment of grounded mica, temperature, the relative air humidity, and the frequency between 100 Hz and 1MHz.
Vliv modifikace jílu na stupeň dispergace a konečné vlastnosti nanokompozitů epoxid-montmorilonit
Rýznarová, B. ; Zelenka, J. ; Lednický, František ; Baldrian, Josef
The effect of four different clay surface modifiers on the degree of dispersion and final properties of epoxy-clay nanocomposites was studied.

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