Diffusion in semi-crystalline polyolefins with lamellar and spherulitic morphology
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F09%3A00021977" target="_blank" >RIV/60461373:22340/09:00021977 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Diffusion in semi-crystalline polyolefins with lamellar and spherulitic morphology
Original language description
This contribution demonstrates the application of AFM (atomic force microscopy) and plasma etching in visualisation of the lamellar structure. Moreover, we have developed modeling tools capable of mapping between the semi-crystalline morphology and transport of penetrants. In this contribution we reconstruct spatially 3D structures of spherulites consisting of lamellae, calculate effective diffusivity of the reconstructed semi-crystalline structure and compare the results to experimental data of diffusion in compact films, fibers and particles with semi-crystalline structure. Diffusion of penetrants in semi-crystalline polymer proceeds only in amorphous phase. Crystalline lamellae not only slow down the transport (by the tortuosity effect), but also constrain the swelling of amorphous phase and thus slow down the transport in amorphous polymer. In the result section we show why polyethylene materials with the same crystallinity often exhibit widely different diffusivities. Moreover, we
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
CI - Industrial chemistry and chemical engineering
OECD FORD branch
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Result continuities
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)
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
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e-ISSN
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Number of pages
8
Pages from-to
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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
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