Diffusion of penetrants in compact polyethylene

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F09%3A00021980" target="_blank" >RIV/60461373:22340/09:00021980 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Diffusion of penetrants in compact polyethylene

Popis výsledku v původním jazyce

The objective of this study is the transport of low molecular weight penetrants, such as ethylene, propylene and 1-hexene, in compact polyethylene or polypropylene. Experimental measurements of diffusion in compact polymer particles or thin films were performed gravimetrically and the measured time-evolution of the sorbed species was corrected for buoyancy effects. Polyolefins are semi-crystalline materials consisting from crystalline and amorphous phase. Additional diffusion measurements were thereforeperformed in polymer melt consisting of a purely amorphous polymer. Dynamics of gas diffusion in the sample was measured as a response to a step change of pressure. Diffusion coefficients were estimated by comparison of model and experimental curves. Dependence of diffusivity on temperature, penetrant pressure (i.e., concentration) and polymer grade were obtained. Obtained results are important not only for the industrial production of polyolefins (where diffusion affects the copolymer

Název v anglickém jazyce

Diffusion of penetrants in compact polyethylene

Popis výsledku anglicky

The objective of this study is the transport of low molecular weight penetrants, such as ethylene, propylene and 1-hexene, in compact polyethylene or polypropylene. Experimental measurements of diffusion in compact polymer particles or thin films were performed gravimetrically and the measured time-evolution of the sorbed species was corrected for buoyancy effects. Polyolefins are semi-crystalline materials consisting from crystalline and amorphous phase. Additional diffusion measurements were thereforeperformed in polymer melt consisting of a purely amorphous polymer. Dynamics of gas diffusion in the sample was measured as a response to a step change of pressure. Diffusion coefficients were estimated by comparison of model and experimental curves. Dependence of diffusivity on temperature, penetrant pressure (i.e., concentration) and polymer grade were obtained. Obtained results are important not only for the industrial production of polyolefins (where diffusion affects the copolymer

Druh

D - Stať ve sborníku

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

—

Projekt

<a href="/cs/project/GA104%2F07%2F1127" target="_blank" >GA104/07/1127: Matematické modelování a experimentální studium utváření meso-skopické struktury polymerních materiálů</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of 36th International Conference of Slovak Society of Chemical Engineering

ISBN

978-80-227-3072-3

ISSN

—

e-ISSN

—

Počet stran výsledku

9

Strana od-do

—

Název nakladatele

Slovak University of Technology

Místo vydání

Bratislava

Místo konání akce

Tatranské Matliare

Datum konání akce

25. 5. 2009

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—