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1.
1. Baller, J. , M. Thomassey, M. Ziehmer, and R. Sanctuary, “ Thermal and chemical glass transition of thermosets in the presence of two types of inorganic nanoparticles,” in Thermoplastic and Thermosetting Polymers and Composites, edited by L. D. Tsai and M. R. Hwang ( Nova Science Publishers, Hauppauge, 2011).
2.
2. Baller, J. , N. Becker, M. Ziehmer, M. Thomassey, B. Zielinski, U. Müller, and R. Sanctuary, “ Interactions between silica nanoparticles and an epoxy resin before and during network formation,” Polymer 50, 32113219 (2009).
http://dx.doi.org/10.1016/j.polymer.2009.05.020
3.
3. Batchelor, G. K. , “ Effect of Brownian motion on bulk stress in a suspension of spherical particles,” J. Fluid Mech. 83, 97117 (1977).
http://dx.doi.org/10.1017/S0022112077001062
4.
4. Beenakker, C. W. J. , “ The effective viscosity of a concentrated suspension of spheres (and its relation to diffusion),” Physica A 128, 4881 (1984).
http://dx.doi.org/10.1016/0378-4371(84)90081-5
5.
5. Beenakker, C. W. J. , and P. Mazur, “ Diffusion of spheres in a concentrated suspension II,” Physica A 126, 349370 (1984).
http://dx.doi.org/10.1016/0378-4371(84)90206-1
6.
6. Dannert, R. , R. Sanctuary, M. Thomassey, P. Elens, J. K. Krüger, and J. Baller, “ Strain-induced low-frequency relaxation in colloidal DGEBA/SiO2 suspensions,” Rheol. Acta 53, 715723 (2014).
http://dx.doi.org/10.1007/s00397-014-0788-9
7.
7. Genovese, D. B. , “ Shear rheology of hard-sphere, dispersed, and aggregated suspensions, and filler-matrix composites,” Adv. Colloid Interface Sci. 2012, 171172.
http://dx.doi.org/10.1016/j.cis.2011.12.005
8.
8. Jiang, T. , and C. F. Zukoski, “ The effect of polymer-induced attraction on dynamical arrests of polymer composites with bimodal particle size distributions,” J. Rheol. 57, 16691691 (2013).
http://dx.doi.org/10.1122/1.4822254
9.
9. Krieger, I. M. , and T. J. Dougherty, “ A mechanism for non Newtonian flow in suspensions of rigid spheres,” Trans. Soc. Rheol. 3, 137152 (1959).
http://dx.doi.org/10.1122/1.548848
10.
10. Lionberger, R. , and W. Russel, “ High frequency modulus of hard sphere colloids,” J. Rheol. 38, 18851908 (1994).
http://dx.doi.org/10.1122/1.550530
11.
11. Morris, J. , “ A review of microstructure in concentrated suspensions and its implications for rheology and bulk flow,” Rheol. Acta 48, 909923 (2009).
http://dx.doi.org/10.1007/s00397-009-0352-1
12.
12. Phung, T. N. , J. F. Brady, and G. Bossis, “ Stokesian dynamics simulation of Brownian suspensions,” J. Fluid Mech. 313, 181207 (1996).
http://dx.doi.org/10.1017/S0022112096002170
13.
13. Shikata, T. , and D. S. Pearson, “ Viscoelastic behavior of concentrated spherical suspensions,” J. Rheol. 38, 601616 (1994).
http://dx.doi.org/10.1122/1.550477
14.
14. van der Werff, J. , C. de Kruif, C. Blom, and J. Mellema, “ Linear viscoelastic behavior of dense hard-sphere dispersions,” Phys. Rev. A 39, 795807 (1989).
http://dx.doi.org/10.1103/PhysRevA.39.795
15.
15. Wagner, N. J. , and J. F. Brady, “ Shear thickening in colloidal dispersions,” Phys. Today 62(10), 2732 (2009).
http://dx.doi.org/10.1063/1.3248476
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/content/sor/journal/jor2/59/2/10.1122/1.4906227
2015-01-22
2016-09-27

Abstract

Concentrated and semidiluted sheared suspensions of silica nanoparticles in Diglycidyl Ether of Bisphenol A have recently been shown to exhibit a low-frequency relaxation process of the shear moduli measured by oscillatory rheology. This process, which is slower than the structural α-process of the matrix, was interpreted as Brownian stress relaxation resulting from strain-induced perturbations of the isotropic filler distribution. In this paper, we extend the rheological investigation of the low-frequency anomaly to ultra-diluted DGEBA/silica suspensions. We illustrate that the Brownian relaxation process depends in a complex manner on the filler volume concentration: For very dilute systems, the relaxation frequency increases with the concentration, whereas for semidilute or concentrated systems, the opposite behavior can be observed. This nonmonotonic dependency of the relaxation frequency leads to a maximum of the relaxation frequency at a volume concentration around 0.133. It can no longer be modeled by Peclet frequencies, since the classical Peclet frequencies depend only on a single concentration dependent physical quantity, viz., the suspension viscosity. A modified Peclet frequency depending on the suspension viscosity and the average surface-to-surface distance between the fillers as a structural, concentration dependent length scale allows for an accurate description of the Brownian relaxation for all concentrations.

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