Rheometric properties of micron-sized CaCO 3 suspensions stabilised by a physical polyol/silica gel for polyurethane foams
作者: Fabrice Saint-MichelFrédéric PignonAlbert Magnin
作者单位: 1Laboratoire de Rhéologie, Institut National Polytechnique de Grenoble, CNRS UMR 5520, Université Joseph Fourier - Grenoble I
刊名: Rheologica Acta, 2005, Vol.44 (6), pp.644-653
来源数据库: Springer Nature Journal
DOI: 10.1007/s00397-005-0446-3
关键词: SuspensionSilicaCalcium carbonatePolyurethaneFoam
原始语种摘要: Abstract(#br)This article considers the rheometric properties of mixtures containing a micron-sized mineral filler of calcium carbonate (CaCO 3 ) in a polymer matrix gelled by adding colloidal silica (CS). These mixtures, consisting of a polymer matrix (polyols, catalysts, surfactant) are used to produce polyurethane foams. The suspending phase (polymer matrix/CS) has a yield stress that has been linked to fractal aggregation of the colloidal filler. Suspensions without any colloidal silica (polymer matrix/CaCO 3 ), show aggregation of CaCO 3 which is most probably due to the adsorption of catalysts present in the polymer matrix. Beyond a critical CaCO 3 volume fraction, a yield stress is detected indicating a 3D connected structure. In the case of suspensions containing colloidal silica...
全文获取路径: Springer Nature  (合作)
影响因子:1.626 (2012)

  • polyol 多元醇
  • sized 过筛的
  • polyurethane 聚氨酯
  • micron 微米
  • silica 硅土
  • properties 道具
  • physical 物理的