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  • 1
    Electronic Resource
    Electronic Resource
    Zum rheologischen Verhalten von Polyethylenmischungen bei niedrigen Deformationsgeschwindigkeiten (1982)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 33 (1982), S. 658-661 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The flow behaviour of blends of linear and branched polyethylene in the molten state is studied as a function of composition. The observed macrorheological behaviour is expressed in terms of the zero shear-viscosity and zero normal stress coefficient ψ0. The zero shear-viscosity and the coefficient ψ0 are increasing functions of the content of dispersed phase. The macrorheological properties are qualitatively related to the microrheological processes.
    Notes: Das Fließverhalten von Mischungen aus linearem und verzweigtem Polyethylen im geschmolzenen Zustand wird in Abhängigkeit von der Zusammensetzung untersucht. Charakterisiert wird das makrorheologische Verhalten der unter suchten Systeme unter Scherbedingungen durch die Viskosität and und den Koeffizienten ψ0 der 1. Normalspannungs differenz in Grenzfall verschwindender Schergeschwindigkeit. Es zeigt sich, daß suwohl die Nullscherviskosität als auch der Koeffizient ψ0 mit dem Massenbruch der dispersen Komponente zunehmen. Das makroheologische Verhalten der untersuchten Polymermischungen wird qualitativ mit mikroheologischen Gegebenbeiten in Zusammenhang gebracht.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1982.010331109
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Wärmeleitfähigkeit gefüllter polyethylene bei tiefen temperaturen (1985)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 36 (1985), S. 159-162 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Heat conductivity data of pure and high density polyethylene filled with calcium carbonate in the temperature range between 2 and 20 k are presented. Differences between experimental data and on the basis of mixture rules computed heat conductivities are related to the pressence of agglomerates of filler particles. Based on these data it is proposed to use heat conductivity measurements for the determination of the state of agglomeration in filled polymers.
    Notes: Meßergebnisse der Wärmeleitfähigkeit von reinem und kreidegefülltem Polyethylen hoher Dichte zwischen 2 und 20 K werden vorgestellt. Die Abweichungen zwischen gemessenen und aus Mischungsformeln berechneten Wärmeleitfähigkeiten sind auf Aggregatbildung von Füllstoffpartikeln zurückzuführen. Ausgehend davon wird vorgeschlagen, Wärmeleitfähigkeitsmessungen bei tiefen Temperaturen zur quantitativen Bestimmung der Aggregatbildung in gefüllten Polymeren zu benutzen.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1985.010360309
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    On the rheology of concentrated dispersions (1984)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 35 (1984), S. 529-533 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Stationäre rheologische Eigenschaften konzentrierter Dispersionen metallischer Partikel in verschiedenen Polymerlösungen werden theoretisch und experimentell untersucht. Die für Dispersionsmedien mit verschiedenen Wechselwirkungsparametern χ erhaltenen Resultate zeigen den starken Einfluß der Thermodynamik polymerer Lösungen auf das rheologische Verhalten der Dispersionen. In stabilen und neutralen Dispersionen wurde nur Strukturviskosität beobachtet, in destabilen Dispersionen bei bestimmten Teilchenkonzentrationen auch Dilatanz.
    Notes: Steady state rheological properties of concentrated dispersions of metallic particles in different polymer solutions are studied both from a theoretical and an experimental point of view. The results obtained with dispersion media with different interaction parameters χ indicate the strong influence of polymer-solvent thermodynamics on the rheological behaviour of the dispersions. With stable and neutrally stable dispersions only shear thinning occurs whereas in unstable dispersions dilatancy was observed, depending on the particle concentration.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1984.010350801
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  • 4
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    Central European floods 2002: lessons learned in Saxony (2008)
    In:  Journal of Flood Risk Management 1(2): 123-129
    Details
    Publication Date: 2008
    Description: In August 2002, Germany and particularly Saxony were hit by a severe flood affecting more than two-thirds of Saxony's territory. This disastrous flood event gave rise to reconsideration and redirection of flood protection and related disaster management in Saxony. A comprehensive strategic approach was developed. Primarily, any reconstruction and flood protection measure is based on Flood Protection Concepts, which have been developed for all relevant rivers till 2005. In these concepts, more than 1600 individual flood protection measures are proposed and 548 flood risk maps for all communities at risk are available. With a new methodology specially developed for this task, all measures were prioritised, and a Flood Protection Investment Programme with considerable financial resources was put into operation. Furthermore, the new state flood centre 'Landeshochwasser-zentrum' has been set up and became operational in 2004. It established an advanced full coverage forecast and alert system that has already demonstrated its reliable performance during recent floods.
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    BIBLIOGRAPHY FLOODS GERMANY
  • 5
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    Preliminary investigations on the defluoridation of water using fired clay chips (1996)
    Elsevier
    Details
    Publication Date: 1996-05-01
    Print ISSN: 1464-343X
    Electronic ISSN: 1879-1956
    Topics: Geosciences
    Published by Elsevier
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    PAPER CURRENT
  • 6
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    Central European floods 2002: lessons learned in Saxony (2008)
    Wiley
    Details
    Publication Date: 2008-07-24
    Electronic ISSN: 1753-318X
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Published by Wiley
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    PAPER CURRENT
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