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Study of crystallization behaviour of electron beam irradiated polypropylene and high-density polyethylene

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dc.title Study of crystallization behaviour of electron beam irradiated polypropylene and high-density polyethylene en
dc.contributor.author Svoboda (FT), Petr
dc.contributor.author Trivedi, Krunal
dc.contributor.author Stoklasa, Karel
dc.contributor.author Svobodová, Dagmar
dc.contributor.author Ougizawa, Toshiaki
dc.relation.ispartof Royal Society Open Science
dc.identifier.issn 2054-5703 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2021
utb.relation.volume 8
utb.relation.issue 3
dc.type article
dc.language.iso en
dc.publisher Royal Soc
dc.identifier.doi 10.1098/rsos.202250
dc.relation.uri https://royalsocietypublishing.org/doi/10.1098/rsos.202250
dc.subject polymer en
dc.subject irradiation en
dc.subject crystallization en
dc.subject spherulite en
dc.subject beta-phase en
dc.description.abstract The influence of electron-beam irradiation on polypropylene (PP) and high-density polyethylene (HDPE) was investigated with a focus on crystallization. A high-temperature (200 degrees C) creep test revealed that the HDPE gradually increased cross-linking density in the range 30-120 kGy, while the PP underwent a chain scission which was quantitatively evaluated by gel permeation chromatography. The mechanical properties were measured in the range -150 to 200 degrees C by a dynamic mechanical analysis. A small presence of C=C and C=O bonds was found in the irradiated PP by a Fourier transform infrared spectroscopy. Crystallization kinetics measured by differential scanning calorimetry and hot-stage optical microscopy results were influenced tremendously by irradiation for HDPE and to a lesser extent for PP. Irradiation caused a decrease in both the number of nucleation centres and the growth rate of individual spherulites. Crystallization was analysed in detail with the help of Hoffman-Lauritzen, Avrami and Arrhenius equations. Interestingly an increasing beta -crystal formation with an increasing irradiation level was discovered for PP by X-ray diffraction. A generation of defects in the crystalline structure owing to irradiation was discussed. en
utb.faculty Faculty of Technology
utb.faculty Faculty of Humanities
dc.identifier.uri http://hdl.handle.net/10563/1010303
utb.identifier.scopus 2-s2.0-85104716454
utb.identifier.wok 000636364700001
utb.source J-wok
dc.date.accessioned 2021-04-30T19:22:35Z
dc.date.available 2021-04-30T19:22:35Z
dc.rights Attribution 4.0 International
dc.rights.uri http://creativecommons.org/licenses/by/4.0/
dc.rights.access openAccess
utb.ou Department of Polymer Engineering
utb.contributor.internalauthor Svoboda (FT), Petr
utb.contributor.internalauthor Trivedi, Krunal
utb.contributor.internalauthor Stoklasa, Karel
utb.contributor.internalauthor Svobodová, Dagmar
utb.wos.affiliation [Svoboda, Petr; Trivedi, Krunal; Stoklasa, Karel] Tomas Bata Univ Zlin, Fac Technol, Dept Polymer Engn, Vavreckova 275, Zlin 76272, Czech Republic; [Svobodova, Dagmar] Tomas Bata Univ Zlin, Fac Humanities, Stefanikova 5670, Zlin 76001, Czech Republic; [Ougizawa, Toshiaki] Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, 2-12-1-S8-33 Ookayama, Tokyo 1528552, Japan
utb.scopus.affiliation Department of Polymer Engineering, Faculty of Technology, Tomas Bata University in Zlin, Vavreckova 275, Zlin, 762 72, Czech Republic; Faculty of Humanities, Tomas Bata University in Zlin, Stefanikova 5670, Zlin, 760 01, Czech Republic; Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1-S8-33, Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
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