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@ARTICLE{Hbner:7927,
      author       = {Hübner, E. and Allgaier, J. and Meyer, M. and Stellbrink,
                      J. and Pyckhout-Hintzen, W. and Richter, D.},
      title        = {{S}ynthesis of polymer/silica hybrid nanoparticles using
                      anionic polymerization techniques},
      journal      = {Macromolecules},
      volume       = {43},
      issn         = {0024-9297},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {PreJuSER-7927},
      pages        = {856 - 867},
      year         = {2010},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {We report a new "grafting to" technique for the
                      functionalization of silica particles with anionically
                      produced polymers. It is based on it two-step procedure. In
                      the first step the silica nanoparticles were modified with
                      multifunctional chlorosilanes. This procedure allows
                      replacing the original Si-OH surface groups by Si-Cl groups.
                      In the second step the anionically synthesized polymers were
                      linked to the Si-Cl functionalized nanoparticle surface.
                      Both the chlorosilane functionalization of the nanoparticles
                      and the subsequent reaction with living polymer can be
                      carried out without irreversible particle aggregation. This
                      was proved by examining the reaction products with static
                      and dynamic light scattering as well as small-angle X-ray
                      scattering. The polymer linking event is accompanied by
                      termination reactions, most likely due to residual Si-OH
                      groups. Therefore the raw products were purified by a simple
                      fractionation procedure. The examination of the products by
                      size exclusion chromatography showed that this procedure
                      allowed removing the free polymer quantitatively. The new
                      anionic based method offers the possibility for grafting
                      densities Lip to 1 chain per nm(2) of particle surface,
                      which is significantly higher than reported in the past for
                      other "grafting to" approaches. The now obtained grafting
                      densities are similar to the ones reported for "grafting
                      from" techniques which are mainly based oil controlled
                      radical polymerization. Our new approach offers the
                      possibility to obtain hybrid materials containing polymers
                      which are not accessible via controlled radical techniques
                      like polydienes. In addition, the new technique allows
                      grafting polymers having molecular weights up to 500 000
                      g/mol and still narrow molecular weight distributions.},
      keywords     = {J (WoSType)},
      cin          = {IFF-4 / IFF-5 / Jülich Centre for Neutron Science JCNS
                      (JCNS) ; JCNS},
      ddc          = {540},
      cid          = {I:(DE-Juel1)VDB784 / I:(DE-Juel1)VDB785 /
                      I:(DE-Juel1)JCNS-20121112},
      pnm          = {BioSoft: Makromolekulare Systeme und biologische
                      Informationsverarbeitung / Großgeräte für die Forschung
                      mit Photonen, Neutronen und Ionen (PNI)},
      pid          = {G:(DE-Juel1)FUEK505 / G:(DE-Juel1)FUEK415},
      shelfmark    = {Polymer Science},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000273618100036},
      doi          = {10.1021/ma902213p},
      url          = {https://juser.fz-juelich.de/record/7927},
}