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@ARTICLE{Kim:168259,
      author       = {Kim, Young Yong and Ahn, Byungcheol and Sa, Seokpil and
                      Jeon, Manseong and Roth, Stephan V. and Kim, Sang Youl and
                      Ree, Moonhor},
      title        = {{S}elf-{A}ssembly {C}haracteristics of a
                      {C}rystalline–{A}morphous {D}iblock {C}opolymer in
                      {N}anoscale {T}hin {F}ilms},
      journal      = {Macromolecules},
      volume       = {46},
      number       = {20},
      issn         = {1520-5835},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {DESY-2014-02451},
      pages        = {8235 - 8244},
      year         = {2013},
      abstract     = {A diblock copolymer of crystalline polyethylene (PE) and
                      amorphous poly(methyl methacrylate) (PMMA), PE69-b-PMMA92,
                      was synthesized; this polymer is thermally stable up to 270
                      °C. The morphological structures of thermally annealed
                      nanoscale thin films of the copolymer were investigated in
                      detail at various temperatures by using in-situ grazing
                      incidence X-ray scattering (GIXS) with a synchrotron
                      radiation source. Quantitative GIXS analysis found that the
                      PE and PMMA blocks undergo phase separation to produce a
                      vertically oriented hexagonal PE cylinder structure in the
                      PMMA matrix that is very stable up to around 100 °C (which
                      is the onset temperature of PE crystal melting and PMMA
                      glass transition); over the range 100–200 °C, slight
                      variations with temperature in the cylinders’ dimensions
                      and orientation were observed. Furthermore, the PE block
                      chains of the cylinder phase crystallize and undergo crystal
                      growth along the cylinders’ long axes; however, these
                      lamellar crystals do not stack properly because of the
                      limited space along the cylinders’ short axes. As a
                      result, the overall crystallinity is very low. The
                      crystallization of the PE block chains in the diblock
                      copolymer thin film is severely restricted in the diblock
                      architecture by the confinement effects of the limited
                      cylinder space and the anchoring of one end of the PE chain
                      to the cylindrical wall interface. Surprisingly, however, in
                      a nanoscale thin film the PE homopolymer forms a highly
                      ordered lamellar structure; the lamellae are well stacked
                      along the out-of-plane of the film, even though the
                      crystallization is confined by the air and substrate
                      interfaces. This well-ordered and oriented lamellar
                      structural morphology does not arise in melt-crystallized PE
                      bulk specimens.},
      cin          = {DOOR / FS-PE},
      ddc          = {540},
      cid          = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)FS-PE-20120731},
      pnm          = {PETRA Beamline P03 (POF2-54G14)},
      pid          = {G:(DE-H253)POF2-P03-20130405},
      experiment   = {EXP:(DE-H253)P-P03-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000326209400018},
      doi          = {10.1021/ma401440y},
      url          = {https://bib-pubdb1.desy.de/record/168259},
}