National Repository of Grey Literature 23 records found  beginprevious14 - 23  jump to record: Search took 0.01 seconds. 
Degradation Of Epoxy Resins With Various Aditives By Solar Radiation
Škarabelová, Lenka
The aim of the project is to study the fundamentals of chemical and physical properties of dielectric materials with focus on epoxy resins. To learn about possible degradation processes in epoxy resins and the phenomena that cause these processes. Next, to propose a suitable methodology for measuring properties of epoxy resins with different fillers affected by sunlight.
Moisture Effect On Electrical Properties Of The Composite Epoxy Resins
Horák, Luděk
The thesis presented is focused on studying electroinsulating epoxy resin-based sealings. The aim of the thesis is to compare several sets of samples of composite epoxy resins with different kinds of micro-ground siliceous sand as a filling. The temperature and frequency dependence of relative permittivity and dissipation factor are measured for given samples.
Study of adhesive penetration into the wood cell wall
Janová, Petra ; Krbila, Jaromír (referee) ; Vaněrek, Jan (advisor)
This labor is based on penetration of adhesive into a wood cell walls. It focuse on adhesives basicly used for construction purposes, especially on epoxy resins. The labor contains the use of methods for precise detection adhesive in wood and methodics for choice of adhesive and wood basically used for bonding. It describes the experimentally detected dependence of contact angle on viscosity epoxy resins.
Degradation of epoxy resins vith various aditives by solar radiation
Škarabelová, Lenka ; Novák, Vítězslav (referee) ; Kazelle, Jiří (advisor)
This master’s thesis is focused on the study of chemical and physical properties of dielectric materials with main focus on epoxy resins. It includes possible processes that can influence the properties of epoxy resins, both processes that improve polymer properties and processes that cause material degradation. Next part of the thesis is a description of diagnostic methods suitable for measurement of basic electrical quantities of material and design of a suitable method for measuring properties of epoxy resins with different additives, influencing the samples by solar radiation. At the end, the work includes an experiment dedicated to the degradation of epoxy resins with various additives by solar radiation and the evaluation of the experiment.
Electrical properties analysis of epoxy resins with different fillers in temperature and frequency dependence
Horák, Luděk ; Novák, Vítězslav (referee) ; Kazelle, Jiří (advisor)
Presented master's thesis is focused on studying electroinsulating epoxy resin-based sealings. It describes the chemical composition, production, properties and measuring methods of basic electric quantities of these materials. The aim of the thesis is to compare several sets of samples of composite epoxy resins with different kinds of micro-ground siliceous sand as a filling. The temperature and frequency dependence of relative permittivity, dissipation factor and inner resistivity are measured for given samples.
Inorganic fillers effect on electrical properties of the epoxy resins
Doležel, Tomáš ; Jirák, Josef (referee) ; Frk, Martin (advisor)
This thesis deals with problems of electrical insulation materials based on epoxy composites used in the electronics industry. This thesis is divided into theoretical part focused on composite materials, their technological processing and diagnostics. It also describes dielectric materials, their properties and events taking place in their structure. The experimental section describes the measurement of electrical properties of samples of electrical insulating materials with different types of fillers.
Electric properties of composite materials with microparticles and nanoparticles
Dvořák, Tomáš ; Polsterová, Helena (referee) ; Hudec, Jiří (advisor)
This thesis study and compare electric properties of micro and nanocomposites based on epoxy resins depending on temperature. In this thesis are observed temperature dependences of the dissipation factor, relative permittivity and internal resistivity.
Analysis of the influence of cellulose fibers in epoxy adhesive designed for wood structural elements bonding
Dvořáková, Martina ; Tupý, Michael (referee) ; Vaněrek, Jan (advisor)
The thesis deals with the properties of epoxy resins, their reinforcing by thermoplastic modified epoxies, rubbers and cellulose fibers. The thesis also describes the production, properties and types of cellulose fibers. In the practical part of this thesis, there was executed reinforcement of epoxy matrix by different amounts of cellulose fibers. Mixing was performed in two ways – by a homogenizer or an ultrasonic homogenizer. There were also executed the tensile strength and shear strength tests to the manufactured conglomerates.
Properties of pultruded composites based on epoxy matrix
Huljak, Pavel ; Bálková, Radka (referee) ; Přikryl, Radek (advisor)
The theoretical part of this bachelor thesis deals with research of composite materials, especially based on polymer epoxy and polyester resins, using as reinforcement a glass fiber bundles. The practical section includes the production of composite materials and their components along with the most important testing methods. The main goal of the experimental part is to characterize the optimal conditions pultrusion production of epoxy composite material. Another point is characterization of mechanical and chemical properties of the produced composite at a number of test methods. Finally the optimized epoxy composite materials are compared with composites based on polyester resins.
Polymer matrix based on epoxydized oils
Kvasničková, Lucie ; Tocháček, Jiří (referee) ; Přikryl, Radek (advisor)
The theoretical part of this bachelor thesis deals with a current state in the field polymer matrix based on vegetable oils and their epoxidation. Subsequently it deals with epoxy resins – particularly their structure, crosslinking and a curing. The experimental part of this research focuses on the amine curing of epoxy resins. A curing of epoxidized soybean oil with various amine curing agents was tested and also a curing of a blend containing comercial epoxy resin and epoxidized soybean oil. Testing pieces were prepared from selected mixtures and a tensile test was performed on them.

National Repository of Grey Literature : 23 records found   beginprevious14 - 23  jump to record:
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