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| Description
| - The work discusses the effects of polymorphism of isotactic polypropylene on its photodegradation behaviour. The starting polymer was modified by a specific α-nucleating/clarifying agent, by a specific β-nucleating agent or their combination. The samples, films of thickness 0.2 mm, were prepared via compression moulding. Differential scanning calorimetry revealed that the modification of isotactic polypropylene by a specific β-nucleating agent caused predominant formation of the trigonal β-phase. With virgin samples modified by α-nucleating agent and combination of both nucleating agents and also with neat polypropylene only monoclinic α-phase was detected. Thus the α-nucleating agent possesses higher nucleating efficiency as compared to β-nucleating agent. The samples were exposed to UV-irradiation in the interval from 0 to 240 hours. The differences in morphology were reflected in different photooxidative behaviour. Infrared spectroscopy showed that neat polyp
- The work discusses the effects of polymorphism of isotactic polypropylene on its photodegradation behaviour. The starting polymer was modified by a specific α-nucleating/clarifying agent, by a specific β-nucleating agent or their combination. The samples, films of thickness 0.2 mm, were prepared via compression moulding. Differential scanning calorimetry revealed that the modification of isotactic polypropylene by a specific β-nucleating agent caused predominant formation of the trigonal β-phase. With virgin samples modified by α-nucleating agent and combination of both nucleating agents and also with neat polypropylene only monoclinic α-phase was detected. Thus the α-nucleating agent possesses higher nucleating efficiency as compared to β-nucleating agent. The samples were exposed to UV-irradiation in the interval from 0 to 240 hours. The differences in morphology were reflected in different photooxidative behaviour. Infrared spectroscopy showed that neat polyp (en)
- Práce diskutuje vliv polymorfismu izotaktického polypropylenu na jeho fotodegradaci. Polypropylen byl modifikován specifickým α-nukleačním/zjasňujícím činidlem, β-nukleačním činidlem a jejich kombinací. Vzorky o tloušťce 0,2 mm byly vyrobeny lisováním. Diferenciální skenovací kalorimetrie odhalila, že modifikace polypropylenu specifickým β-nukleačním činidlem vedlo k majoritní tvorbě trigonální β-fáze. V případě čistého, α-nukleovaného a polypropylenu nukeovaného oběma činidly byly pozorována tvorba α-fáze. Lze tedy říci, že α-nukleační činidlo vykazuje vyšší účinnost než β-nukleační činidlo. Vzorky byly vystaveny UV-záření v intervalu od 0 do 240 hodin. Rozdíly v morfologii se odrazily na degradačním chování jednotlivých vzorků. Čistý polypropylen byl nejvíce citlivý k fotooxidaci, naopak tomu bylo u β-nukleovaného vzorku. (cs)
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| Title
| - Photodegradation of Polypropylene Containing Nucleating Agents
- Fotodegradace polypropylenu obsahujícího nukleační činidla (cs)
- Photodegradation of Polypropylene Containing Nucleating Agents (en)
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| skos:prefLabel
| - Photodegradation of Polypropylene Containing Nucleating Agents
- Fotodegradace polypropylenu obsahujícího nukleační činidla (cs)
- Photodegradation of Polypropylene Containing Nucleating Agents (en)
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| skos:notation
| - RIV/70883521:28110/08:63507028!RIV09-GA0-28110___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(GP106/07/P262), Z(MSM7088352101)
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/70883521:28110/08:63507028
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - Photodegradation of Polypropylene Containing Nucleating Agents (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...v/mistoKonaniAkce
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| http://linked.open...i/riv/mistoVydani
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
| |
| http://linked.open...iv/tvurceVysledku
| - Commereuc, Sophie
- Navrátilová, Jana
- Verney, Vincent
- Čermák, Roman
- Raab, Miroslav
- Mošnovská, Radka
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| http://linked.open...vavai/riv/typAkce
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| http://linked.open.../riv/zahajeniAkce
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| http://linked.open...n/vavai/riv/zamer
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| number of pages
| |
| http://purl.org/ne...btex#hasPublisher
| - Polymer Processing Society (IT)
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| https://schema.org/isbn
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| http://localhost/t...ganizacniJednotka
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