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

Kalogeras, IM; Roussos, M; Vassilikou-Dova, A; Spanoudaki, A; Pissis, P; Savelyev, YV; Shtompel, VI; Robota, LP

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