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Polypropylene after thirty years of storage: mechanical proof of heterogeneous aging

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dc.title Polypropylene after thirty years of storage: mechanical proof of heterogeneous aging en
dc.contributor.author Sližová, Marta
dc.contributor.author Stašek, Martin
dc.contributor.author Raab, Miroslav
dc.relation.ispartof Polymer Journal
dc.identifier.issn 0032-3896 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2020
dc.type article
dc.language.iso en
dc.publisher Nature Publishing Group
dc.identifier.doi 10.1038/s41428-020-0327-8
dc.relation.uri https://www.nature.com/articles/s41428-020-0327-8
dc.description.abstract The effects of 30 years of storage on the mechanical behavior and hierarchical structure of isotactic polypropylene were characterized. In addition, the structure and properties of the aged samples exposed to subsequent annealing were assessed. The long-term storage caused a dramatic loss of ductility, as manifested by the strain-at-break and impact strength data. The embrittlement was accompanied by a distinct increase in the crystallinity of both the alpha and beta phases, as revealed by X-ray diffraction. The dynamic mechanical behavior was influenced, but insignificantly. A comparison of static and dynamic mechanical data suggests the development of structural heterogeneities in the amorphous phase of the semicrystalline material upon aging. Under mechanical stress, these heterogeneities serve as fracture loci. Subsequent annealing of the aged samples partly reversed the loss of ductility. This indicates healing of the hypothetical irregularities by the thermal treatment. In addition, annealing caused complete transformation of the beta crystallites into the alpha phase. en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1009659
utb.identifier.scopus 2-s2.0-85083389760
utb.identifier.wok 000521525400001
utb.source J-wok
dc.date.accessioned 2020-05-06T19:41:53Z
dc.date.available 2020-05-06T19:41:53Z
utb.contributor.internalauthor Sližová, Marta
utb.contributor.internalauthor Stašek, Martin
utb.wos.affiliation [Slizova, Marta; Stasek, Martin] Tomas Bata Univ Zlin, Fac Technol, Dept Phys & Mat Engn, Vavreckova 275, Zlin 76001, Czech Republic; [Raab, Miroslav] CR, Inst Macromol Chem, Prague 16206, Czech Republic
utb.scopus.affiliation Department of Physics and Materials Engineering, Faculty of Technology, Tomas Bata University in Zlin, Vavrečkova 275, Zlín, 760 01, Czech Republic; Emeritus, Institute of Macromolecular Chemistry, AS CR, Prague, 162 06, Czech Republic
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