Diplomová práce se zabývá zkoumáním vlivu některých fyzikálních faktorů, jako jsou tloušťka materiálu nebo způsob zpracování, na fotodegradaci izotaktického polypropylenu. Vzorky připravené lisováním nebo vstřikováním byly vystaveny UV záření.Rozsah degradace byl analyzován za použití infračervené spektroskopie s Fourierovou transformací nebo technikou infračervené spektroskopie se zeslabenou úplnou reflektancí. Dále byl zkoumán degradační profil lisovaných vzorků za použití mikro-infračervené spektroskopie.
Annotation in English
Master thesis is focused on the role of physical factors such as thickness or mode of processing in photodegradation of isotactic polypropylene. Samples were prepared via compression moulding or injection moulding and subsequently exposed to UV radiation. The extent of degradation was determined by using Fourier transform infrared spectroscopy or by attenuated total reflection infrared spectroscopy. Next, the degradation profile of compression-moulded samples was analysed by micro-infrared spectroscopy.
Diplomová práce se zabývá zkoumáním vlivu některých fyzikálních faktorů, jako jsou tloušťka materiálu nebo způsob zpracování, na fotodegradaci izotaktického polypropylenu. Vzorky připravené lisováním nebo vstřikováním byly vystaveny UV záření.Rozsah degradace byl analyzován za použití infračervené spektroskopie s Fourierovou transformací nebo technikou infračervené spektroskopie se zeslabenou úplnou reflektancí. Dále byl zkoumán degradační profil lisovaných vzorků za použití mikro-infračervené spektroskopie.
Annotation in English
Master thesis is focused on the role of physical factors such as thickness or mode of processing in photodegradation of isotactic polypropylene. Samples were prepared via compression moulding or injection moulding and subsequently exposed to UV radiation. The extent of degradation was determined by using Fourier transform infrared spectroscopy or by attenuated total reflection infrared spectroscopy. Next, the degradation profile of compression-moulded samples was analysed by micro-infrared spectroscopy.
The work will be focused on the assessment of the effects of individual physical factors on the process of polypropylene photooxidation. Samples will be prepared via compression moulding and injection moulding. Subsequently, the samples with various processing history and shapes will be exposed to UV-light in accelerated ageing device. The extent of photooxidation will be measured using infrared spectroscopy in both transmission and reflection mode. This approach should bring an overview of the contribution of individual physical factors to the photodegradation of polypropylene.
Research Plan
The work will be focused on the assessment of the effects of individual physical factors on the process of polypropylene photooxidation. Samples will be prepared via compression moulding and injection moulding. Subsequently, the samples with various processing history and shapes will be exposed to UV-light in accelerated ageing device. The extent of photooxidation will be measured using infrared spectroscopy in both transmission and reflection mode. This approach should bring an overview of the contribution of individual physical factors to the photodegradation of polypropylene.
Recommended resources
Schnabel, W. Polymer Degradation: Principles and Practical Applications. Munich: Hanser, 1981. ISBN 3446132643
Geuskens, G. Degradation and Stabilization of Polymers. London: Applied Science Publ., 1975.
Obadal, M., Čermák, R., Raab, M., Verney, V., Commereuc, S., Fraisse, F. Study on photodegradation of injection-moulded {β}-polypropylenes. (2006) Polymer Degradation and Stability, 91 (3), pp. 459-463.
Recommended resources
Schnabel, W. Polymer Degradation: Principles and Practical Applications. Munich: Hanser, 1981. ISBN 3446132643
Geuskens, G. Degradation and Stabilization of Polymers. London: Applied Science Publ., 1975.
Obadal, M., Čermák, R., Raab, M., Verney, V., Commereuc, S., Fraisse, F. Study on photodegradation of injection-moulded {β}-polypropylenes. (2006) Polymer Degradation and Stability, 91 (3), pp. 459-463.
