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@ARTICLE{Banc:279281,
      author       = {Banc, Amélie and Genix, Anne-Caroline and Dupas,
                      Christelle and Sztucki, Michael and Schweins, Ralf and
                      Appavou, Marie-Sousai and Oberdisse, Julian},
      title        = {{O}rigin of {S}mall-{A}ngle {S}cattering from
                      {C}ontrast-{M}atched {N}anoparticles: {A} {S}tudy of {C}hain
                      and {F}iller {S}tructure in {P}olymer {N}anocomposites},
      journal      = {Macromolecules},
      volume       = {48},
      number       = {18},
      issn         = {1520-5835},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2015-07296},
      pages        = {6596 - 6605},
      year         = {2015},
      note         = {"final draft post referee" kann nicht beigebracht werden},
      abstract     = {The conformation of poly(ethyl methacrylate) chains in
                      silica–latex nanocomposites has been studied under zero
                      average contrast conditions (ZAC) using small-angle neutron
                      scattering (SANS). Samples have been prepared by drying
                      colloidal suspensions of silica and polymer nanoparticles
                      (NPs) followed by thermal annealing, for two different
                      silica NPs (radius of 5 and 15 nm) and two chain molecular
                      weights (17 and 100 kg/mol). By appropriate mixing of
                      hydrogenated and deuterated polymer, chain scattering
                      contrast is introduced, and in principle silica scattering
                      suppressed. The silica structure consisting mostly of small
                      fractal aggregates is characterized by transmission electron
                      microscopy (TEM) and small-angle X-ray scattering (SAXS) on
                      the same samples. The measurement of the chain structure by
                      SANS, however, is perturbed by unwanted silica
                      contributions, as often reported in the literature. Here,
                      the contribution of contrast-matched silica is evidenced as
                      a function of system parameters, namely chain mass, silica
                      size, and volume fraction, and a model rationalizing these
                      contributions for the first time is proposed. On the basis
                      of a statistical analysis, a nanometer-thick polymer shell
                      surrounding silica NPs is shown to create contrast, which is
                      presumably maintained by the reduced mobility of polymer
                      close to interfaces or attractive polymer–silica
                      interactions. This shell is proven to be quantitatively
                      important only for the smallest silica NPs. Finally, the
                      pure polymer scattering can be isolated, and the polymer
                      radius of gyration is found to be independent of filler
                      content and NP size.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106},
      pnm          = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)KWS2-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000361935600027},
      doi          = {10.1021/acs.macromol.5b01424},
      url          = {https://juser.fz-juelich.de/record/279281},
}