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  Surname Name Title Thesis status   Supervisors Reviewers Type of thesis Date of def. Title
Student Type of thesis - - - - - - - - - -
Item shown in detail HRABALOVÁ Includes the selected person into the timetable overlap calculation. Marta Photodegradation of Beta-Nucelated Polypropylene: The Effect of Structure Photodegradation of Beta-Nucelated Polypropylene: The Effect of Structure Thesis finished and defended successfully (DUO).   Navrátilová Jana Čermák Roman Master's thesis 1181512800000 11.06.2007 Photodegradation of Beta-Nucelated Polypropylene: The Effect of Structure Thesis finished and defended successfully (DUO).
Marta HRABALOVÁ Master's thesis 0XX 0XX 0XX 0XX 0XX 0XX 0XX 0XX 0XX 0XX

Thesis info Fotodegradace beta-nukleovaných polypropylenů: Vliv struktury

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Name HRABALOVÁ Marta Includes the selected person into the timetable overlap calculation.
Acad. Yr. 2006/2007
Assigning department TUIP
Date of defence Jun 11, 2007
Type of thesis Master's thesis
Thesis status Thesis finished and defended successfully (DUO). Thesis finished and defended successfully (DUO).
Completeness of mandatory entries - The following mandatory fields are not filled in for this Thesis.: Title in English
Main topic Photodegradation of beta-nucleated polypropylene: the effect of structure parameters
Main topic in English Photodegradation of Beta-Nucelated Polypropylene: The Effect of Structure
Title according to student Fotodegradace beta-nukleovaných polypropylenů: Vliv struktury
English title as given by the student -
Parallel name -
Subtitle -
Thesis supervisor Navrátilová Jana, doc. Ing. Ph.D.
External examiner Čermák Roman, prof. Ing. Ph.D.
Annotation Tato diplomová práce zkoumá možnosti vlivu velikosti indexu toku taveniny polypropylenu bez obsahu nuklečního činidla a polypropylenu obsahujícího -nukleační činidlo (na bázi N,N’-dicyklohexyl-2,6-naftalendikarboxamidu v množství 0,03 hm.%) na fotooxidační degradabilitu. Pět komerčně využívaných druhů polypropylenu lišících se v hodnotě indexu toku taveniny byly vystaveny UV-záření v různě dlouhých časových intervalech. Změny, které se vyskytly ve vzorcích byly postupně sledovány s použitím infračervené spektroskopie, diferenciální snímací kalorimetrie, rentgenografie a optickou mikroskopií. Výsledky ukázaly, že -nukleace výrazně zlepšuje stabilitu polypropylenu vůči UV-záření. Vyšlo na jevo, že velikost indexu toku taveniny nemá jednoznačný vliv na fotodegradaci tohoto materiálu.
Annotation in English This master thesis probes the possible options of influence of melt flow rate on photooxidative degradability of neat polypropylene and polypropylene containing -nucleating agent based on N,N’-dicyclohexyl-2,6-naphtalenedicarboxamide in the amount of 0.03 wt.%. Five commercial grades of polypropylene differing in melt flow index were exposed to the UV-radiation for several exposition durations and consequently the changes accrued in these samples were progressively monitored by infrared spectroscopy, differential scanning calorimetry, X-ray diffraction and optical microscopy. The results showed that the -nucleation significantly enhanced the stability of polypropylene against UV-light. However, the melt flow rate was not found to play an important role it the process of photooxidation.
Keywords izotaktický polypropylen, polymorfismus, -fáze, {α}-fáze, fotooxidace, index toku taveniny
Keywords in English isotactic polypropylene, polymorphism, -form, {α}-form, photooxidation, melt flow index
Length of the covering note 78
Language AN
Annotation
Tato diplomová práce zkoumá možnosti vlivu velikosti indexu toku taveniny polypropylenu bez obsahu nuklečního činidla a polypropylenu obsahujícího -nukleační činidlo (na bázi N,N’-dicyklohexyl-2,6-naftalendikarboxamidu v množství 0,03 hm.%) na fotooxidační degradabilitu. Pět komerčně využívaných druhů polypropylenu lišících se v hodnotě indexu toku taveniny byly vystaveny UV-záření v různě dlouhých časových intervalech. Změny, které se vyskytly ve vzorcích byly postupně sledovány s použitím infračervené spektroskopie, diferenciální snímací kalorimetrie, rentgenografie a optickou mikroskopií. Výsledky ukázaly, že -nukleace výrazně zlepšuje stabilitu polypropylenu vůči UV-záření. Vyšlo na jevo, že velikost indexu toku taveniny nemá jednoznačný vliv na fotodegradaci tohoto materiálu.
Annotation in English
This master thesis probes the possible options of influence of melt flow rate on photooxidative degradability of neat polypropylene and polypropylene containing -nucleating agent based on N,N’-dicyclohexyl-2,6-naphtalenedicarboxamide in the amount of 0.03 wt.%. Five commercial grades of polypropylene differing in melt flow index were exposed to the UV-radiation for several exposition durations and consequently the changes accrued in these samples were progressively monitored by infrared spectroscopy, differential scanning calorimetry, X-ray diffraction and optical microscopy. The results showed that the -nucleation significantly enhanced the stability of polypropylene against UV-light. However, the melt flow rate was not found to play an important role it the process of photooxidation.
Keywords
izotaktický polypropylen, polymorfismus, -fáze, {α}-fáze, fotooxidace, index toku taveniny
Keywords in English
isotactic polypropylene, polymorphism, -form, {α}-form, photooxidation, melt flow index
Research Plan The aim of this Master thesis is to verify the effect of molecular structure on photodegradation of neat and beta-nucleated polypropylene. Polypropylenes with different melt flow index will be UV-irradiated and then examined by several methods. Infrared spectroscopy, X-ray scattering and differential scanning calorimetry will be employed.
Research Plan
The aim of this Master thesis is to verify the effect of molecular structure on photodegradation of neat and beta-nucleated polypropylene. Polypropylenes with different melt flow index will be UV-irradiated and then examined by several methods. Infrared spectroscopy, X-ray scattering and differential scanning calorimetry 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, William 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, William Andrew Publishing/Plastics Design Library, 1998, ISBN: 1-884207-58-8

and scientific articles
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, William 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, William Andrew Publishing/Plastics Design Library, 1998, ISBN: 1-884207-58-8

and scientific articles
Týká se praxe No
Enclosed appendices -
Appendices bound in thesis tables
Taken from the library Yes
Full text of the thesis
Appendices
Reviewer's report
Supervisor's report
Defence procedure record file