rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Neutron Spin Echo Spectroscopy Viscoelasticity Rheology
  name:
    name part: SpringerLink (Online service)
  type of resource: text
  origin info:
    place:
      place term: gw
    date issued: 1997
    edition: 1st ed. 1997.
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: electronic
    form: electronic resource
    reformatting quality: access
    form: remote
    extent: VII, 248 p. online resource.
  abstract: Viscoelasticandtransportpropertiesofpolymersintheliquid(solution,melt)or liquid-like (rubber) state determine their processing and application to a large extent and are of basic physical interest [1-3]. An understanding of these dynamic properties at a molecular level, therefore, is of great importance. However,thisunderstandingiscomplicatedbythefactsthatdi?erentmotional processes may occur on di?erent length scales and that the dynamics are governed by universal chain properties as well as by the special chemical structure of the monomer units [4,5]. The earliest and simplest approach in this direction starts from Langevin equations with solutions comprising a spectrum of relaxation modes [1-4]. Special features are the incorporation of entropic forces (Rouse model, [6]) which relax uctuations of reduced entropy, and of hydrodynamic interactions (Zimm model, [7]) which couple segmental motions via long-range back ow elds in polymer solutions, and the inclusion of topological constraints or entanglements (reptation or tube model, [8-10]) which are mutually imposed within a dense ensemble of chains. Another approach, neglecting the details of the chemical structure and concentratingontheuniversalelementsofchainrelaxation,isbasedondynamic scalingconsiderations[4,11].Inparticularinpolymersolutions,thisapproach o?ers an elegant tool to specify the general trends of polymer dynamics, although it su?ers from the lack of a molecular interpretation. A real test of these theoretical approaches requires microscopic methods, which simultaneously give direct access to the space and time evolution of the segmental di?usion. Here, quasi-elastic scattering methods play a crucial role sincetheyallowthemeasurementofthecorrespondingcorrelationfunctions.In particular,thehigh-resolutionneutronspinecho(NSE)spectroscopy[12-15]is very suitable for such investigations since this method covers an appropriate range in time (0.005)t/ns)40) and space (r/nm [15). Furthermore, the possibilityofl…
  table of contents: Neutron Spin Echo Investigations on the Segmental Dynamics of Polymers in Melts, Networks and Solutions -- Deformation and Viscoelastic Behavior of Polymer Gels in Electric Fields -- Rheology of Polymers Near Liquid-Solid Transitions.
  subject:
    topic: Polymers
  subject:
    topic: Condensed matter
  subject:
    topic: Polymer Sciences
  subject:
    topic: Condensed Matter Physics
  classification: QD380-388
  classification: 541.2254
  related item:
    title info:
      title: Springer eBooks
  related item:
    title info:
      title: Advances in Polymer Science, 134
  identifier: 9783540684497
  identifier: https://doi.org/10.1007/3-540-68449-2
  record info:
    record creation date: 121227
    record change date: 20191024213524.0
    record identifier: 978-3-540-68449-7