TRANSPORT OF PENETRANTS IN SEMI-CRYSTALINE LLDPE STUDIED BY PRESSURE-DECAY METHOD

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

TRANSPORT OF PENETRANTS IN SEMI-CRYSTALINE LLDPE STUDIED BY PRESSURE-DECAY METHOD

Popis výsledku v původním jazyce

In the case of semi-crystalline polymers, such as LLDPE, the equilibrium sorption in the polymer-penetrant system can?t be described as the simple sorption of penetrant in the amorphous polymer phase, because the swelling of amorphous polymer is elastically constrained by the surrounding crystallites. This constraining effect is the source of a large discrepancy between measured sorption data and theoretical predictions. The fraction of constrained segments of amorphous polymer has been determined fromour previous gravimetric measurements in the apparatus utilizing magnetic suspension balance. The constraining effect is affecting also diffusion transport of penetrants in LLDPE. Therefore we constructed and are going to introduce a new pressure-decay apparatus capable to measure diffusion and sorption both above and below the polymer melting temperature. Results of these measurements are going to be explained and processed. However, these measurements provide us with the combined effec

Název v anglickém jazyce

TRANSPORT OF PENETRANTS IN SEMI-CRYSTALINE LLDPE STUDIED BY PRESSURE-DECAY METHOD

Popis výsledku anglicky

In the case of semi-crystalline polymers, such as LLDPE, the equilibrium sorption in the polymer-penetrant system can?t be described as the simple sorption of penetrant in the amorphous polymer phase, because the swelling of amorphous polymer is elastically constrained by the surrounding crystallites. This constraining effect is the source of a large discrepancy between measured sorption data and theoretical predictions. The fraction of constrained segments of amorphous polymer has been determined fromour previous gravimetric measurements in the apparatus utilizing magnetic suspension balance. The constraining effect is affecting also diffusion transport of penetrants in LLDPE. Therefore we constructed and are going to introduce a new pressure-decay apparatus capable to measure diffusion and sorption both above and below the polymer melting temperature. Results of these measurements are going to be explained and processed. However, these measurements provide us with the combined effec

Druh

D - Stať ve sborníku

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 37th International Conference of Slovak Society of Chemical Engineering, 2010

ISBN

978-80-227-3290-1

ISSN

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e-ISSN

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Počet stran výsledku

11

Strana od-do

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Název nakladatele

Slovak Society of Chemical Engineering

Místo vydání

Bratislava

Místo konání akce

Tatranské Matliare, Slovensko

Datum konání akce

1. 1. 2010

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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