Roentgen micro-tomography of polyolefin particles and validation of the mathematical model of transport

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F09%3A00022867" target="_blank" >RIV/60461373:22340/09:00022867 - 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
Roentgen micro-tomography of polyolefin particles and validation of the mathematical model of transport
Original language description
This contribution addresses problems associated with morphology of porous polyethylene and polypropylene particles produced in catalytic gas- and liquid-dispersion reactors. The first addressed problem is the digital reconstruction of polyolefin particles from X-ray micro-tomography images. The second problem is the dynamics of diffusion of penetrants out from the polymer particle because this process is crucial for the post-polymerization processing of the polymer. This dynamics of particle degassing is also measured in the laboratory. In porous polyolefin particles with broad distribution of solid polymer zones the degassing curve cannot be approximated with simple Fick?s diffusion from the compact spherical particle. We demonstrate that monomer masstransport limitations are important not only in the early stage of particle growth, but also in fully-developed polyolefin particles. We illustrate examination of the internal porous structure of polyolefin particles by scanning electron
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
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Sborník prací ze semináře Reakční a transportní jevy III
ISBN
978-80-7080-725-5
ISSN
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e-ISSN
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Number of pages
10
Pages from-to
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Publisher name
VŠCHT Praha
Place of publication
Praha
Event location
Jablonec nad Nisou
Event date
Jun 10, 2009
Type of event by nationality
CST - Celostátní akce
UT code for WoS article
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