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Description
| - Kritický přehled literárních dat o teplotě skelného přechodu poly(vinylfenolu) odhalil značný rozptyl hodnot v rozmezí 53 až 194 °C, který lze jen zčásti vysvětlit závislostí na molární hmotnosti. Důvodem může být zbytková vlhkost anebo rozpouštědlo v nedostatečně vysušených vzorcích. Na základě dvou třetin literárních dat byla navržena regresní rovnice pro závislost Tg na 1/Mn. Dva komerční vzorky PVPh byly studovány DSC, ATR-FTIR a SEC metodou. Byl vypracován postup přesně definované přípravy vzorků pro stanovení Tg. (cs)
- Critical overview of literature data on the glass transition temperature Tg of poly(4-vinylphenol) PVPh revealed a large scatter of values ranging between 53 and 194 °C, which can only partially be attributed to molecular-mass effect. The reason could be seen in residual moisture and/or solvent in samples subjected to insufficient or even no drying. Based on selected two thirds of literature data, a regression equation is proposed for the dependence of Tg on 1/Mn. Two samples of commercial PVPh were studied by DSC, ATR-FTIR, and SEC methods. A procedure of preparing well defined samples for Tg determination has been elaborated.
- Critical overview of literature data on the glass transition temperature Tg of poly(4-vinylphenol) PVPh revealed a large scatter of values ranging between 53 and 194 °C, which can only partially be attributed to molecular-mass effect. The reason could be seen in residual moisture and/or solvent in samples subjected to insufficient or even no drying. Based on selected two thirds of literature data, a regression equation is proposed for the dependence of Tg on 1/Mn. Two samples of commercial PVPh were studied by DSC, ATR-FTIR, and SEC methods. A procedure of preparing well defined samples for Tg determination has been elaborated. (en)
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Title
| - Note on the glass transition temperature of poly(vinylphenol)
- Teplota skelného přechodu poly(vinylfenolu) (cs)
- Note on the glass transition temperature of poly(vinylphenol) (en)
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skos:prefLabel
| - Note on the glass transition temperature of poly(vinylphenol)
- Teplota skelného přechodu poly(vinylfenolu) (cs)
- Note on the glass transition temperature of poly(vinylphenol) (en)
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skos:notation
| - RIV/61389013:_____/09:00325269!RIV09-AV0-61389013
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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/61389013:_____/09:00325269
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http://linked.open...riv/jazykVysledku
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http://linked.open.../riv/klicovaSlova
| - Poly(4-vinylphenol); glass transition temperature; differential scanning calorimetry (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
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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...UplatneniVysledku
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http://linked.open...v/svazekPeriodika
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http://linked.open...iv/tvurceVysledku
| - Dybal, Jiří
- Sikora, Antonín
- Kratochvíl, Jaroslav
- Šturcová, Adriana
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http://linked.open...ain/vavai/riv/wos
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http://linked.open...n/vavai/riv/zamer
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issn
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number of pages
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is http://linked.open...avai/riv/vysledek
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