Silica nanocomposite, rheology

Rubber-based nanocomposites were also prepared from different nanofillers (other than nanoclays) like nanosilica etc. Bandyopadhyay et al. investigated the melt rheological behavior of ACM/silica and ENR/silica hybrid nanocomposites in a capillary rheometer [104]. TEOS was used as the precursor for silica. Both the rubbers were filled with 10, 30 and 50 wt% of tetraethoxysilane (TEOS). The shear viscosity showed marginal increment, even at higher nanosilica loading, for the rubber/silica nanocomposites. All the compositions displayed pseudoplastic behavior and obeyed the power law model within the experimental conditions. The... 

J. Oberdisse, Structure and rheological properties of Latex-Silica nanocomposite films stress-strain isotherms, Macromolecules 35 (2002) 9441. 

Zhang Q, Archer LA (2002) Poly(ethylene oxide)/silica nanocomposites structure and rheology. Langmuir 18(26) 10435-10442... 

Cassagnau P (2008) Melt rheology of organoclay and fumed silica nanocomposites. Polymer 49 2183-2196... 

Sternsteiu S S and Zhu A J (2002) Reinforcement mechanism of nanofilled polymer melts as elucidated by nonlinear viscoelastic behavior. Macromolecules 35 7262-7273. Zhang Q and Archer L A (2002) Poly(ethylene oxide)/silica nanocomposites structure and rheology, Langmuir 18 10435-10442. 

Understanding the melt rheology of rubber nanocomposites is crucial from the processing perspective. Bandyopadhyay et al. [37] have studied the melt flow behavior of rubber-silica hybrid nanocomposites in a capillary rheometer. 

Hadjistamov (1999) examined the effect of nanoscale silica on the rheology of silicone oil and uncured epoxy-resin (araldite) systems. Shear thickening and yield-stress-like behaviour were observed and found to be due to a build-up of network structure associated with the nanocomposite phase. 

Rheological properties Rheology is the study of the deformation and flow of matter under the influence of an applied stress. The measurement of rheological properties is helpful to predict the physical properties of polymer nanocomposites during and after processing. Oberdisse [44] studied the rheological properties of a special nanocomposite material obtained by film formation of mixtures of colloidal silica and nanolatex solutions by means of uniaxial strain experiments. 

On the contrary, it has been found that the rheological properties of silica-latex nanocomposites are a result of matrix properties and of their modification in the presence of silica filler. The filler structure of the nanocomposites is governed by the... 

These rheological results, coupled with other experimental techniques, offer a control parameter of the silica contribution, and of the evolution of the corresponding phenomena, with volume fractions. Also, these studies contribute to a better understanding of the reinforcement effect in nanocomposites. 

Banc Amelie, Genix Anne-Caroline, Chirat Mathieue, et al. Tnning strnctnre and rheology of silica-latex nanocomposites with the molecular weight of matrix chains A coupled SAXS-TEM-Simulation Approach. Macromolecules. Al no. 9 (2014) 3219-3230. 

Silicon dioxide (Si02), also known as silica nanoparticles are widely used as nanofillers in different polymeric systems. The particular interest in SiOa is due to commercial availability of several types with different surface area and porosity, their thermal stability and the transparency of obtained nanocomposites [1], including polycarbonate and poly(methyl metacrylate) modified with nano-Si02 to mention just a few [2,3]. Another important aspect is arising from improved rheological and mechanical properties as well as control of the morphology and phase separation [4]. 

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