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

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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 mass transport 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 microscope with 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 mass transport 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 microscope with (en)
Title	Roentgen micro-tomography of polyolefin particles and validation of the mathematical model of transport Roentgen micro-tomography of polyolefin particles and validation of the mathematical model of transport (en)
skos:prefLabel	Roentgen micro-tomography of polyolefin particles and validation of the mathematical model of transport Roentgen micro-tomography of polyolefin particles and validation of the mathematical model of transport (en)
skos:notation	RIV/60461373:22340/09:00022867!RIV10-GA0-22340___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(GA104/07/1127), P(GD104/08/H055)
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Kosek, Juraj Šeda, Libor Zubov, Alexandr Meisterová, Lucie Štěpánek, František
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta chemicko-inženýrská
http://linked.open...dnocenehoVysledku	339648
http://linked.open...ai/riv/idVysledku	RIV/60461373:22340/09:00022867
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	X-ray micro-tomography; diffusion; particle morphology; computer modeling (en)
http://linked.open.../riv/klicoveSlovo	diffusion particle morphology computer modeling X-ray micro-tomography
http://linked.open...ontrolniKodProRIV	[07584AC8F34E]
http://linked.open...v/mistoKonaniAkce	Jablonec nad Nisou
http://linked.open...i/riv/mistoVydani	Praha
http://linked.open...i/riv/nazevZdroje	Sborník prací ze semináře Reakční a transportní jevy III
http://linked.open...in/vavai/riv/obor	CI
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Transport and reaction processes in complex multiphase systems Mathematical modeling and experimental study of the evolution of meso-scopic structure of polymeric materials
http://linked.open...UplatneniVysledku	2009
http://linked.open...iv/tvurceVysledku	Kosek, Juraj Štěpánek, František Zubov, Alexandr Šeda, Libor Pecháčková, Lucie
http://linked.open...vavai/riv/typAkce	CST - Celostátní
http://linked.open.../riv/zahajeniAkce	2009-06-10 (xsd:date)
number of pages	10 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Vysoká škola chemicko-technologická v Praze
https://schema.org/isbn	978-80-7080-725-5
http://localhost/t...ganizacniJednotka	22340
is http://linked.open...avai/riv/vysledek of	Roentgen micro-tomography of polyolefin particles and validation of the mathematical model of transport Roentgen micro-tomography of polyolefin particles and validation of the mathematical model of transport Roentgen micro-tomography of polyolefin particles and validation of the mathematical model of transport Roentgen micro-tomography of polyolefin particles and validation of the mathematical model of transport

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