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Effect of molecular weight and extensional rheology on melt blown process stability for linear isotactic polypropylenes

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dc.title Effect of molecular weight and extensional rheology on melt blown process stability for linear isotactic polypropylenes en
dc.contributor.author Drábek, Jiří
dc.contributor.author Zatloukal, Martin
dc.relation.ispartof Novel Trends in Rheology VIII
dc.identifier.issn 0094-243X Scopus Sources, Sherpa/RoMEO, JCR
dc.identifier.isbn 9780735418394
dc.date.issued 2019
utb.relation.volume 2107
dc.event.title 8th International Conference on Novel Trends in Rheology
dc.event.location Zlín
utb.event.state-en Czech Republic
utb.event.state-cs Česká republika
dc.event.sdate 2019-07-30
dc.event.edate 2019-07-31
dc.type conferenceObject
dc.language.iso en
dc.publisher American Institute of Physics Inc.
dc.identifier.doi 10.1063/1.5109500
dc.relation.uri https://aip.scitation.org/doi/abs/10.1063/1.5109500
dc.description.abstract Two linear isotactic polypropylenes with different molecular weight have been used to produce nonwovens via melt blown technology in order to understand role of molecular weight and extensional rheology on fiber diameter distribution. Extensional rheology was assessed by the strain rate dependent uniaxial extensional viscosity (estimated from the entrance pressure drop using the Gibson method) as well as through infinite shear to zero-shear viscosity ratio η∞/η0 (obtained directly from the shear viscosity data measured in a very wide shear rate range), which was shown to be related with temperature and basic molecular characteristics of given polymers via a simple equation. This allowed us to determine η∞/η0 ratio for additional nine polypropylene melt blown nonwovens with known weight average molecular weight and coefficient of fiber diameter variation, taken from the open literature. Obtained results indicates that firstly, an increase in the molecular weight decreases η∞/η0 as well as maximum attainable normalized extensional viscosity ηE,∞/3η0 and secondly, there exists optimum η∞/η0 ratio, at which the coefficient of fiber diameter variation is minimal. © 2019 Author(s). en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1008811
utb.identifier.obdid 43880529
utb.identifier.scopus 2-s2.0-85067095091
utb.identifier.wok 000479303100009
utb.source d-scopus
dc.date.accessioned 2019-08-13T10:17:22Z
dc.date.available 2019-08-13T10:17:22Z
dc.description.sponsorship Grant Agency of the Czech Republic [16-05886S]
utb.contributor.internalauthor Drábek, Jiří
utb.contributor.internalauthor Zatloukal, Martin
utb.wos.affiliation [Drabek, Jiri; Zatloukal, Martin] Tomas Bata Univ Zlin, Fac Technol, Polymer Ctr, Vavreckova 275, Zlin 76001, Czech Republic
utb.scopus.affiliation Polymer Centre, Faculty of Technology, Tomas Bata University in Zlín, Vavrečkova 275, Zlín, 760 01, Czech Republic
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