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@ARTICLE{Melnichenko:34049,
      author       = {Melnichenko, Y. B. and Wignall, G. D. and Schwahn, D.},
      title        = {{U}niversal behavior of polymers in blends, solutions, and
                      supercritical mixtures and implications for the validity of
                      the random phase approximation},
      journal      = {Fluid phase equilibria},
      volume       = {212},
      issn         = {0378-3812},
      address      = {New York, NY [u.a.]},
      publisher    = {Science Direct},
      reportid     = {PreJuSER-34049},
      pages        = {209 - 219},
      year         = {2003},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Blending (or mixing) of macromolecules is widely used to
                      tailor the properties of polymeric materials and small-angle
                      neutron scattering (SANS) has provided detailed information
                      at the molecular level on the ability of different polymer
                      species to mix or segregate at various thermodynamic
                      conditions. For two decades, SANS data have been analyzed
                      via the de Gennes "random phase approximation" (RPA) [P.-G.
                      de Gennes, Scaling Concepts in Polymer Physics, second ed.,
                      Cornell University Press, Ithaca, London, 1979], which is
                      based on the assumption that the dimensions of polymer
                      chains remain unchanged on mixing for all concentrations and
                      temperatures. Here we investigate the effect of temperature
                      and concentration on the dimensions of macromolecules in
                      blends using SANS and high-concentration labeling methods
                      and construct a generic phase diagram, which specifies the
                      range of validity of the RPA. Using scaling arguments, we
                      demonstrate a parallel between the structure-property
                      relationships in blends and solutions of polymers in small
                      molecule solvents and reveal the impact of the chain length
                      of the polymeric solvent on the phase behavior of polymer
                      blends. The results offer new insights into the universality
                      of the thermodynamic properties and structure of
                      macromolecules in polymeric, liquid and supercritical
                      solvents. (C) 2003 Elsevier B.V. All rights reserved.},
      keywords     = {J (WoSType)},
      cin          = {IFF-NST},
      ddc          = {660},
      cid          = {I:(DE-Juel1)VDB34},
      pnm          = {Kondensierte Materie},
      pid          = {G:(DE-Juel1)FUEK242},
      shelfmark    = {Thermodynamics / Chemistry, Physical / Engineering,
                      Chemical},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000185445100016},
      doi          = {10.1016/S0378-3812(03)00259-0},
      url          = {https://juser.fz-juelich.de/record/34049},
}