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Lanthanidocenes and their Precursors Synthesis
Koporecová, Zuzana ; Pilátová, Ivana (referee) ; Richtera, Lukáš (advisor)
The aim of this work is to summarize the issues spectroscopic techniques useful in organometallic and polymer synthesis, including sample preparation and interpretation of the data, with a focus on NMR spectroscopy, vibrational spectroscopy and X-ray structural analysis. Part of the work deals with the characteristics of lanthanides, lantanidocens and synthesis of some lantanidocene compounds. Next are in this thesis prepared special laboratory techniques, working with Schlenk vessels, glove box and a dry bag.
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Analysis of rubber materials of gas masks
Koporecová, Zuzana ; Tocháček, Jiří (referee) ; Bálková, Radka (advisor)
The thesis deals with determination the type, composition and structure of rubber materials comming from gas masks produced withing sixteen years. Rubber materials were tested to determine if storage conditions could influence or caused the change in composition and/or the structure. To judge it rubber specimens were exposed to termo-oxidative aging at 75 and 105 °C for 50 ad 20 days, respectively, to obtain data for comparison. Termogravimetry Fourie-transform Infrared Spectroscopy with Attenuated Total Reflection and Differential Scanning Calorimetry were used to characterize composition/structure of tested speciments. Thermo-oxidative aging at 75 °C led to degradation of additives in both types of rubber, at 150 °C also to chemical degradation of rubber network especially in case of NR (glass transition temperature increases with aging time). Neither additives or rubber network was degraded in original rubber specimens. Deterioration of mechanical and, thus, utility properties of gass masks are not supposed any they are recommended to safe usage.
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Analysis of rubber materials of gas masks
Koporecová, Zuzana ; Tocháček, Jiří (referee) ; Bálková, Radka (advisor)
The thesis deals with determination the type, composition and structure of rubber materials comming from gas masks produced withing sixteen years. Rubber materials were tested to determine if storage conditions could influence or caused the change in composition and/or the structure. To judge it rubber specimens were exposed to termo-oxidative aging at 75 and 105 °C for 50 ad 20 days, respectively, to obtain data for comparison. Termogravimetry Fourie-transform Infrared Spectroscopy with Attenuated Total Reflection and Differential Scanning Calorimetry were used to characterize composition/structure of tested speciments. Thermo-oxidative aging at 75 °C led to degradation of additives in both types of rubber, at 150 °C also to chemical degradation of rubber network especially in case of NR (glass transition temperature increases with aging time). Neither additives or rubber network was degraded in original rubber specimens. Deterioration of mechanical and, thus, utility properties of gass masks are not supposed any they are recommended to safe usage.
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Lanthanidocenes and their Precursors Synthesis
Koporecová, Zuzana ; Pilátová, Ivana (referee) ; Richtera, Lukáš (advisor)
The aim of this work is to summarize the issues spectroscopic techniques useful in organometallic and polymer synthesis, including sample preparation and interpretation of the data, with a focus on NMR spectroscopy, vibrational spectroscopy and X-ray structural analysis. Part of the work deals with the characteristics of lanthanides, lantanidocens and synthesis of some lantanidocene compounds. Next are in this thesis prepared special laboratory techniques, working with Schlenk vessels, glove box and a dry bag.
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