Cílem této diplomové práce je studium vlivu {α}-nukleačního činidla na fotodegradaci polypropylenu. Vzorky polypropylenu s různým obsahem {α}-nukleačního činidla Millad 3988 na bázi 1,3;2,4-bis(3,4-dimethylbenzyliden)sorbitolu byly vystaveny UV záření v různých časových intervalech a následně zkoumány různými metodami. Změny, které se vyskytly ve vzorcích, byly sledovány infračervenou spektroskopií, rentgenovou difrakcí, diferenciální skenovací kalorimetrií a optickou mikroskopií. Bylo zjištěno, že použití {α}-nukleačního činidla Millad 3988 nemá zásadní vliv na rozsah fotooxidace. Ovlivňuje však průběh oxidace, a to zejména vznik trhlin na povrchu vzorků.
Annotation in English
The aim of this Master thesis is to study the effect of {α}-nucleating/clarifying agent on photodegradation of polypropylene. Samples of polypropylene with different amounts of commercial {α}-nucleating agent Millad 3988 based on 1,3;2,4-bis(3,4-dimethylbenzylidene)sorbitol were exposed to the UV-radiation for several exposition durations and then examined by several methods. The changes in the samples were monitored by infrared spectroscopy, X-ray scattering, differential scanning calorimetry and optical microscopy. It was found that {α}-nucleating agent Millad 3988 does not significantly influence the extent of photooxidation. However, it affects the course of oxidation, mainly the formation of the cracks on the surface of the samples.
Cílem této diplomové práce je studium vlivu {α}-nukleačního činidla na fotodegradaci polypropylenu. Vzorky polypropylenu s různým obsahem {α}-nukleačního činidla Millad 3988 na bázi 1,3;2,4-bis(3,4-dimethylbenzyliden)sorbitolu byly vystaveny UV záření v různých časových intervalech a následně zkoumány různými metodami. Změny, které se vyskytly ve vzorcích, byly sledovány infračervenou spektroskopií, rentgenovou difrakcí, diferenciální skenovací kalorimetrií a optickou mikroskopií. Bylo zjištěno, že použití {α}-nukleačního činidla Millad 3988 nemá zásadní vliv na rozsah fotooxidace. Ovlivňuje však průběh oxidace, a to zejména vznik trhlin na povrchu vzorků.
Annotation in English
The aim of this Master thesis is to study the effect of {α}-nucleating/clarifying agent on photodegradation of polypropylene. Samples of polypropylene with different amounts of commercial {α}-nucleating agent Millad 3988 based on 1,3;2,4-bis(3,4-dimethylbenzylidene)sorbitol were exposed to the UV-radiation for several exposition durations and then examined by several methods. The changes in the samples were monitored by infrared spectroscopy, X-ray scattering, differential scanning calorimetry and optical microscopy. It was found that {α}-nucleating agent Millad 3988 does not significantly influence the extent of photooxidation. However, it affects the course of oxidation, mainly the formation of the cracks on the surface of the samples.
The aim of this Master thesis is to study the effect of {α}-nucleating/clarifying agent on the photodegradation of polypropylene. Polypropylenes with different amounts of commercial {α}-nucleating agent Millad 3988 based on 1,3;2,4-bis(3,4-dimethylbenzylidene)sorbitol will be UV-irradiated and then examined by several methods. Infrared spectroscopy, X-ray scattering, differential scanning calorimetry and optical microscopy will be employed.
Research Plan
The aim of this Master thesis is to study the effect of {α}-nucleating/clarifying agent on the photodegradation of polypropylene. Polypropylenes with different amounts of commercial {α}-nucleating agent Millad 3988 based on 1,3;2,4-bis(3,4-dimethylbenzylidene)sorbitol will be UV-irradiated and then examined by several methods. Infrared spectroscopy, X-ray scattering, differential scanning calorimetry and optical microscopy will be employed.
Recommended resources
Wypych, G.: Handbook of Material Weathering (2nd Edition), ChemTec Publishing, 1995, ISBN: 1-895198-12-7
Wypych, G.: Weathering of Plastics - Testing to Mirror Real Life Performance, Wiliam Andrew Publishing/Plastics Design Library, 1999, ISBN: 1-884207-75-8
Karger-Kocsis, J.: Polypropylene - An A-Z Reference, Springer - Verlag, 1999, ISBN: 0-412-80200-7
Maier, C.; Calafut, T.: Polypropylene - The Definitive User's Guide and Databook, Wiliam Andrew Publishing/Plastics Design Library, 1998,
ISBN: 1-884207-58-8
Recommended resources
Wypych, G.: Handbook of Material Weathering (2nd Edition), ChemTec Publishing, 1995, ISBN: 1-895198-12-7
Wypych, G.: Weathering of Plastics - Testing to Mirror Real Life Performance, Wiliam Andrew Publishing/Plastics Design Library, 1999, ISBN: 1-884207-75-8
Karger-Kocsis, J.: Polypropylene - An A-Z Reference, Springer - Verlag, 1999, ISBN: 0-412-80200-7
Maier, C.; Calafut, T.: Polypropylene - The Definitive User's Guide and Databook, Wiliam Andrew Publishing/Plastics Design Library, 1998,
ISBN: 1-884207-58-8
