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Diffusion of penetrants in compact polyethylene

The result's identifiers

  • Result code in 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>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Diffusion of penetrants in compact polyethylene

  • Original language description

    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

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

    CI - Industrial chemistry and chemical engineering

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/GA104%2F07%2F1127" target="_blank" >GA104/07/1127: Mathematical modeling and experimental study of the evolution of meso-scopic structure of polymeric materials</a><br>

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2009

  • Confidentiality

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

Data specific for result type

  • Article name in the collection

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

  • ISBN

    978-80-227-3072-3

  • ISSN

  • e-ISSN

  • Number of pages

    9

  • Pages from-to

  • Publisher name

    Slovak University of Technology

  • Place of publication

    Bratislava

  • Event location

    Tatranské Matliare

  • Event date

    May 25, 2009

  • Type of event by nationality

    WRD - Celosvětová akce

  • UT code for WoS article