Penetrant transport in semi-crystalline polyethylene measured by pressure decay method

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F10%3A00023239" target="_blank" >RIV/60461373:22340/10:00023239 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Penetrant transport in semi-crystalline polyethylene measured by pressure decay method
Original language description
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
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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