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@ARTICLE{Perny:34289,
      author       = {Perny, S. and Allgaier, J. and Cho, D. and Lee, W. and
                      Chang, T.},
      title        = {{S}ynthesis and structural analysis of an h-shaped
                      polybutadiene},
      journal      = {Macromolecules},
      volume       = {34},
      issn         = {0024-9297},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {PreJuSER-34289},
      pages        = {5408 - 5415},
      year         = {2001},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The synthesis of an H-shaped polybutadiene homopolymer as
                      well as its detailed structural characterization is
                      investigated. Anionic polymerization techniques together
                      with chlorosilane linking agents were used for the
                      production of the material. After each reaction step samples
                      were taken and analyzed by size exclusion chromatography
                      (SEC), membrane osmometry (MO), NMR, and temperature
                      gradient interaction chromatography (TGIC). According to the
                      characterization by SEC, MO, and NMR, the H-polymer showed a
                      high degree of structural uniformity after purification by
                      fractionation, and no significant amounts of differently
                      branched byproducts could be detected. The TGIC analysis
                      however revealed the presence of large amounts of
                      structures, mainly with lower branching degree. We also
                      found that a significant isotope effect exists in the TGIC
                      retention between deuterated and hydrogenous polymers. In
                      our case, where the H-polymer is partially deuterated, the
                      TGIC analysis enabled us to resolve all the side products.
                      Comparison of the different analysis methods indicates that
                      the precise structural analysis of branched model polymers
                      such as the H-polymer requires more sophisticated methods
                      than used in the past.},
      keywords     = {J (WoSType)},
      cin          = {IFF-NST},
      ddc          = {540},
      cid          = {I:(DE-Juel1)VDB34},
      pnm          = {Polymere, Membranen und komplexe Flüssigkeiten},
      pid          = {G:(DE-Juel1)FUEK53},
      shelfmark    = {Polymer Science},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000170152200013},
      doi          = {10.1021/ma001608v},
      url          = {https://juser.fz-juelich.de/record/34289},
}