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@ARTICLE{Hertle:201055,
      author       = {Hertle, Yvonne and Zeiser, Michael and Hasenöhrl,
                      Christoph and Busch, Peter and Hellweg, Thomas},
      title        = {{R}esponsive {P}({NIPAM}-co-{N}t{BAM}) microgels:
                      {F}lory–{R}ehner description of the swelling behaviour},
      journal      = {Colloid $\&$ polymer science},
      volume       = {288},
      number       = {10-11},
      issn         = {1435-1536},
      address      = {Berlin},
      publisher    = {Springer},
      reportid     = {FZJ-2015-03365},
      pages        = {1047 - 1059},
      year         = {2010},
      abstract     = {In the present work, a systematic series of
                      poly(N-isopropylacrylamide)(NIPAM)
                      –poly(N-tert-butylacrylamide) (NtBAM) copolymer microgels
                      is prepared by surfactant-free emulsion polymerisation using
                      N,N′-methylenebis(acrylamide) (BIS) as cross-linker. The
                      thermoresponsive behaviour of these colloids was studied in
                      detail applying different scattering techniques. The
                      swelling curves obtained on the basis of photon correlation
                      spectroscopy (PCS) are analysed using the theoretical model
                      of Flory and Rehner. The PCS measurements reveal the narrow
                      particle size distribution of the poly(NIPAM-co-NtBAM)
                      microgels and a decreasing hydrodynamic radius as well as a
                      decreasing volume phase transition temperature (VPTT) with
                      increasing comonomer content. The description of the
                      swelling ratio α as a function of temperature by the
                      Flory–Rehner theory for uncharged homopolymer gels was
                      only partially satisfying and fails for higher comonomer
                      contents. In addition, small angle neutron scattering (SANS)
                      is used to study the internal network structure of these
                      microgels, and the polymer network is characterised in terms
                      of the correlation length ξ. Above the transition
                      temperature, only interfacial scattering from the totally
                      collapsed particles in water can be observed. Due to a
                      certain surface roughness of the copolymer microgels, the
                      SANS profiles beyond the VPTT were fitted using a modified
                      Porod law.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1 /
                      JCNS-2},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)JCNS-2-20110106},
      pnm          = {54G - JCNS (POF2-54G24)},
      pid          = {G:(DE-HGF)POF2-54G24},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000279214700001},
      doi          = {10.1007/s00396-010-2232-8},
      url          = {https://juser.fz-juelich.de/record/201055},
}