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dc.contributor.authorDencheva, Nadya Vasilevapor
dc.contributor.authorStribeck, Almutpor
dc.contributor.authorDenchev, Z.por
dc.identifier.citationDENCHEVA N, STRIBECK A, DENCHEV Z* - Nanostructure Development in Multicomponent Polymer Systems and its Characterization by X-ray scattering, European Polymer Journal, 81:447-469 (2016)por
dc.description.abstractModern synchrotron beamlines equipped with two-dimensional detectors and high-flux microfocus devices offer interesting possibilities for polymer characterization. This work presents three synchrotron X-ray studies performed in specific multicomponent polymer systems. In the first study, quantification of transcrystallinity in microfibrillar composites (MFC) by wide-angle X-ray scattering (WAXS) and a direct relation between the mechanical properties of the composites and the thickness of the transcrystalline layers is presented. The second study demonstrates monitoring of nanostructure development under controlled strain in MFC and their precursors by small-angle X-ray scattering (SAXS). A specially developed procedure for data treatment that uses the Chord Distribution Function formalism permitted to prove reversible strain-induced crystallization of matrix material in the MFC materials. In the third study, a 5 5 lm high flux X-ray beam was used to scan in WAXS mode polymer microcapsules (average diameters of 20–50 lm) with polyamide shells in which various solid payloads were incorporated by in-situ polymerization. Exfoliation/intercalation phenomena and local inhomogeneity at micron scale are studied in clay and metal containing polyamide microcapsules that constitute a new platform for the development of polymer hybrids or smart micro devices. It was concluded that relating microscopy and/or mechanical data of various polymer samples to their synchrotron WAXS/SAXS patterns helps to understand the structure–properties relationship in complex polymer systems with controlled composition, morphology and nanostructure.por
dc.description.sponsorshipThis work was supported by FEDER funds through the COMPETE 2020 Programme and National Funds through Portuguese Foundation for Science and Technology (FCT) under the project UID/CTM/50025/2013. N. Dencheva is grateful to the FCT for supporting her research by the postdoctoral award SFRH/BPD/45252/2008 and to the n-STeP project with reference NORTE-07-0124-FEDER-000039, supported by the Programa Operacional Regional do Norte (ON.2). The financial support of PETRA III (MiNaXS beamline) of the German Synchrotron Facility DESY – Hamburg (Project No I-20130095 EC) Germany are also gratefully acknowledged.por
dc.subjectSynchrotron X-ray scattering of polymerspor
dc.subjectSEM (scanning electron microscopy)por
dc.subjectMicrofocus X-ray studiespor
dc.subjectMulticomponent polymer systemspor
dc.subjectPolymer microcapsulespor
dc.titleNanostructure development in multicomponent polymer systems characterized by synchrotron X-ray scatteringpor
dc.subject.fosCiências Naturais::Ciências Físicaspor
dc.subject.wosScience & Technologypor
sdum.journalEuropean Polymer Journalpor
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