Micron-scale origin of the shear-induced structure in Laponite–poly(ethylene oxide) dispersions
作者: John R. BruynFrédéric PignonEmir TsabetAlbert Magnin
作者单位: 1Department of Physics and Astronomy, University of Western Ontario
2Department of Physics and Physical Oceanography, Memorial University of Newfoundland
3Laboratoire de Rhéologie, Université Joseph Fourier Grenoble I, Institut National Polytechnique de Grenoble, CNRS, UMR 5520
刊名: Rheologica Acta, 2008, Vol.47 (1), pp.63-73
来源数据库: Springer Nature Journal
DOI: 10.1007/s00397-007-0211-x
关键词: Polymer–clay compositesLight scattering yield-stressStress relaxationShear-induced structure
英文摘要: Abstract(#br)We study the transient response to simple shear of aqueous dispersions of Laponite clay particles and poly(ethylene oxide) at concentrations for which shear induces structure in the form of a network of polymer–clay bonds. We examine the effects of shear on the structure at the micrometer length scale. Bulk rheometric measurements give the material’s response to step changes in shear rate. We find that a critical value of the shear rate separates two regions with different rheological behaviors. Static small-angle light scattering shows a corresponding qualitative change in the anisotropy of the dispersion under shear at the micron scale. We interpret our results in terms of the effects of shear on the interactions between clay particles and polymer chains and on the...
全文获取路径: Springer Nature  (合作)
影响因子:1.626 (2012)

  • ethylene oxide 氧丙环
  • origin 起原
  • poly 
  • induced 感应的
  • structure 构造
  • scale 度盘
  • shear 切变