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Structure and relaxation dynamics of poly(amide urethane)s with bioactive transition metal acetyl acetonates in hard blocks

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dc.contributor.author Kalogeras, IM en
dc.contributor.author Roussos, M en
dc.contributor.author Vassilikou-Dova, A en
dc.contributor.author Spanoudaki, A en
dc.contributor.author Pissis, P en
dc.contributor.author Savelyev, YV en
dc.contributor.author Shtompel, VI en
dc.contributor.author Robota, LP en
dc.date.accessioned 2014-03-01T01:23:08Z
dc.date.available 2014-03-01T01:23:08Z
dc.date.issued 2005 en
dc.identifier.issn 1292-8941 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/16830
dc.subject Dielectric Relaxation en
dc.subject Differential Scanning Calorimetry en
dc.subject Glass Transition Temperature en
dc.subject Hydrogen Bond en
dc.subject Industrial Application en
dc.subject Metal Ion en
dc.subject Molecular Dynamic en
dc.subject Temperature Dependence en
dc.subject thermally stimulated current en
dc.subject Weak Interaction en
dc.subject Transition Metal en
dc.subject Wide Angle X Ray Scattering en
dc.subject.classification Chemistry, Physical en
dc.subject.classification Materials Science, Multidisciplinary en
dc.subject.classification Physics, Applied en
dc.subject.classification Polymer Science en
dc.subject.other Calorimetry en
dc.subject.other Chemical relaxation en
dc.subject.other Crystallization en
dc.subject.other Dielectric materials en
dc.subject.other Molecular dynamics en
dc.subject.other X ray scattering en
dc.subject.other Acetyl acetonates en
dc.subject.other Poly(amide urethanes) en
dc.subject.other Relaxation dynamics en
dc.subject.other Thermal transitions en
dc.subject.other Polyurethanes en
dc.subject.other acetyl acetonate en
dc.subject.other alkanone en
dc.subject.other amide en
dc.subject.other biomaterial en
dc.subject.other chelating agent en
dc.subject.other hydroxybutyric acid en
dc.subject.other metal en
dc.subject.other polyurethan en
dc.subject.other article en
dc.subject.other bioremediation en
dc.subject.other chemistry en
dc.subject.other comparative study en
dc.subject.other differential scanning calorimetry en
dc.subject.other methodology en
dc.subject.other pharmaceutics en
dc.subject.other spectroscopy en
dc.subject.other thermodynamics en
dc.subject.other X ray diffraction en
dc.subject.other Amides en
dc.subject.other Biocompatible Materials en
dc.subject.other Biodegradation, Environmental en
dc.subject.other Calorimetry, Differential Scanning en
dc.subject.other Chelating Agents en
dc.subject.other Hydroxybutyrates en
dc.subject.other Metals en
dc.subject.other Pentanones en
dc.subject.other Polyurethanes en
dc.subject.other Spectrum Analysis en
dc.subject.other Technology, Pharmaceutical en
dc.subject.other Thermodynamics en
dc.subject.other X-Ray Diffraction en
dc.title Structure and relaxation dynamics of poly(amide urethane)s with bioactive transition metal acetyl acetonates in hard blocks en
heal.type journalArticle en
heal.identifier.primary 10.1140/epje/e2005-00048-3 en
heal.identifier.secondary http://dx.doi.org/10.1140/epje/e2005-00048-3 en
heal.language English en
heal.publicationDate 2005 en
heal.abstract Structural characteristics, thermal transitions and molecular dynamics of selected poly(amide urethane)s with transition metal acetyl acetonates Me(AcAc)(2) (Me = Sn4+, Zn2+, Cu2+, Pb2+) as chain extenders, were comparatively investigated using small- and wide-angle X-ray scattering (SAXS, WAXS), differential scanning calorimetry (DSC), and dielectric techniques (dielectric relaxation spectroscopy, DRS; thermally stimulated currents, TSC). We studied the influence of metal chelates on the mixing of the soft-segment (SS) and hard-segment (HS) domains and the related degree of microphase separation (DMS). The reactivity of Me(AcAc)(2) with macrodiisocyanate was found to decrease in the order Sn(AcAc)(2)Cl-2 > Cu(AcAc)(2) > Zn(AcAc)(2) > Pb(AcAc)(2). While Pb(AcAc)(2) shows a higher tendency for crystallisation, both the dielectric and calorimetric results suggest that the corresponding polyurethane has comparatively low DMS. The type of the transition metal has moderate effect on the glass transition temperature and no influence on the shape of the dielectric alpha relaxation signal, indicating weak interactions between metal ions and SS domains. In contrast, structural parameters and the dielectric behaviour of the beta relaxation suggest preference for hydrogen-bonding interactions between Sn4+ and Cu2+ metal-chelates and HS domains. The temperature dependence of dc conductivity sigma(dc) is described by the Vogel-Tammann-Fulcher equation and signifies the coupling between the mobility of polymeric chains and charges' motion. It may be expected that the present combination of techniques and particular results with respect to DMS will contribute to the development and testing of novel biodegradation-resistant and antibacterial metal-polyurethanes for biotechnological and industrial applications. en
heal.publisher SPRINGER en
heal.journalName European Physical Journal E en
dc.identifier.doi 10.1140/epje/e2005-00048-3 en
dc.identifier.isi ISI:000233998900010 en
dc.identifier.volume 18 en
dc.identifier.issue 4 en
dc.identifier.spage 467 en
dc.identifier.epage 481 en


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