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@INPROCEEDINGS{Tang:823972,
      author       = {Tang, Hu and Stiakakis, Emmanuel and Lettinga, M.P. and
                      Dhont, Jan K.G.},
      title        = {{S}uppressed shear banding in entangled {DNA} solution by
                      attractive interaction},
      reportid     = {FZJ-2016-06598},
      year         = {2016},
      abstract     = {Shear banding, or strain localization, a narrow zone of
                      intense shearing strain caused by non-homogeneous
                      deformation, is quite ubiquitous in solid and complex
                      fluids. In complex fluids, the existing of shear banding
                      would make conventional rheology difficult to interpret.
                      Especially, in entangled polymer system, the existence of
                      shear banding would overturn the well-known Tube theory. So
                      there is considerable debate over whether shear banding
                      observed in entangled polymers such as Polybutadiene is true
                      or not.We report here just by tuning the attractive
                      interaction between chains, the flow behaviour changes from
                      well-defined banded flow to almost linear flow for the same
                      entangled polymer system. The attractive interaction between
                      polymer chains is gained by grafting short PNIPA (Mw=3k)
                      chains on the DNA main chains with rather low grafting
                      density. The grafting PNIPA doesn’t change the flow
                      behavior of DNA at temperature lower than its LCST while at
                      higher temperature than LCST, the PNIPA undergoes
                      coil-to-globule conformation change and add an attractive
                      interaction on the main DNA chain, which becomes stronger
                      and stronger with temperature. With stronger attractive
                      interaction, the velocity profile becomes almost linear.
                      These observations would help us to understand the mechanism
                      for shear banding in entangle polymer systems on a molecular
                      level and explain why shear banding occurs in some system
                      but not in others.},
      month         = {Sep},
      date          = {2016-09-04},
      organization  = {The 30th Conference of European
                       Colloid and Interface Society, Rome
                       (Italy), 4 Sep 2016 - 9 Sep 2016},
      subtyp        = {After Call},
      cin          = {ICS-3},
      cid          = {I:(DE-Juel1)ICS-3-20110106},
      pnm          = {551 - Functional Macromolecules and Complexes (POF3-551)},
      pid          = {G:(DE-HGF)POF3-551},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/823972},
}