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| rdf:type
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| Description
| - Vliv UV ozáření v průběhu akcelerované fotodegradace na vývoj struktury alfa a beta-polypropylénu je náplní této práce. Strukturní vývoj je sledován pomocí řady experimentálních metod na molekulární, nadmolekulární a mikroskopické úrovni. Byl nalezen výrazný efekt nukleace - pouze 0.03 hm. % nukleantu výrazně zpomalil průběh fotodegradace. (cs)
- The effects of UV irradiation on neat and ?-nucleated isotactic polypropylenes have been studied at the molecular, morphological and microscopic levels. Commercially available isotactic polypropylene (PP) was modified by a specific ?-nucleating agent based on N,N?-dicyclohexylnaphthalene-2, 6-dicarboxamide. Compression-moulded plates were prepared from both starting (?-PP) and nucleated (?-PP) polypropylenes and exposed to UV irradiation. The exposure time varied from 0 to 240 h. Molecular degradation and the evolution of supermolecular structure were determined using infrared spectroscopy, wide-angle X-ray scattering and differential scanning calorimetry; surface cracking was observed by light microscopy. Lower degradability was found in ?-PP as compared to ?-PP; an increase in crystallinity on short-time exposure followed by crystallinity decrease with prolonged exposure was detected in both samples. The ?-phase content in the crystalline portion of ?-PP remained stable during UV irradiation under g
- The effects of UV irradiation on neat and ?-nucleated isotactic polypropylenes have been studied at the molecular, morphological and microscopic levels. Commercially available isotactic polypropylene (PP) was modified by a specific ?-nucleating agent based on N,N?-dicyclohexylnaphthalene-2, 6-dicarboxamide. Compression-moulded plates were prepared from both starting (?-PP) and nucleated (?-PP) polypropylenes and exposed to UV irradiation. The exposure time varied from 0 to 240 h. Molecular degradation and the evolution of supermolecular structure were determined using infrared spectroscopy, wide-angle X-ray scattering and differential scanning calorimetry; surface cracking was observed by light microscopy. Lower degradability was found in ?-PP as compared to ?-PP; an increase in crystallinity on short-time exposure followed by crystallinity decrease with prolonged exposure was detected in both samples. The ?-phase content in the crystalline portion of ?-PP remained stable during UV irradiation under g (en)
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| Title
| - Structure evolution of alfa- And betha-polypropylenes upon UV irradiation: A multiscale comparison
- Structure evolution of alfa- And betha-polypropylenes upon UV irradiation: A multiscale comparison (en)
- Vývoj struktury alfa a beta-polypropylénu během UV ozáření: Víceúrovňové porovnání (cs)
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| skos:prefLabel
| - Structure evolution of alfa- And betha-polypropylenes upon UV irradiation: A multiscale comparison
- Structure evolution of alfa- And betha-polypropylenes upon UV irradiation: A multiscale comparison (en)
- Vývoj struktury alfa a beta-polypropylénu během UV ozáření: Víceúrovňové porovnání (cs)
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| skos:notation
| - RIV/70883521:28110/05:63504257!RIV06-MSM-28110___
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| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...iv/cisloPeriodika
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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/70883521:28110/05:63504257
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - beta-Polypropylene; Degradation kinetics; Photo-oxidation; Specific nucleation; Structure evolution (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
| - GB - Spojené království Velké Británie a Severního Irska
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
| - Polymer Degradation and Stability
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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
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Commereuc, Sophie
- Verney, Vincent
- Čermák, Roman
- Obadal, Martin
- Raab, Miroslav
- Fraisse, Frederic
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| issn
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| number of pages
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| http://localhost/t...ganizacniJednotka
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