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The effect of polymer-induced attraction on dynamical arrests of polymer composites with bimodal particle size distributions

Journal Article · · Journal of Rheology
DOI:https://doi.org/10.1122/1.4822254· OSTI ID:1876425
 [1];  [2]
  1. Univ. of Illinois at Urbana-Champaign, IL (United States); 3M Corporate R&D, Maplewood, MN (United States); University of Illinois
  2. Univ. of Illinois at Urbana-Champaign, IL (United States); Univ. at Buffalo, NY (United States)
We explore the flow properties of nanocomposite melts where the particles have bimodal size distributions and experience a weak attraction produced by suspending silica particles in polyethylene glycol melts with a molecular weight of 2000 (PEG2000). The polymer is unentangled and adsorbs to the particle surface. Here, the volume fraction ratio of large particles to total particle volume fraction, R, is systematically varied to study the effects of this polymer-induced attraction on suspension rheology. The maximum volume fraction, Φm, of the particles varies in a nonmonotonic manner of R as demonstrated in studies of the same mixtures when suspended in polyethylene glycol with a molecular weight of 400 (PEG400), where the particles experience excluded volume interactions. The dynamical arrest volume fraction Φx, of nanocomposite melts in PEG2000 monotonically increases with R. In frequency sweep experiments, the plateau elastic modulus is dominated by attractive interactions and increases with the total particle volume fraction, Φc, proportionally with 1/(h2< D >), where < D > is the volume average particle diameter and h is the average particle-particle surface separation. As R is varied, this universal yielding behavior occurs at constant surface separation, h, suggesting that the flow properties of the mixtures can be understood as being equivalent to flow properties of homogeneous particle suspensions experiencing short-range attractions with an extent independent of particle size.
Research Organization:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
FG02-07ER46453; FG02-07ER46471
OSTI ID:
1876425
Journal Information:
Journal of Rheology, Journal Name: Journal of Rheology Journal Issue: 6 Vol. 57; ISSN 0148-6055
Publisher:
Society of RheologyCopyright Statement
Country of Publication:
United States
Language:
English

References (54)

Yielding and Flow of Monodisperse Emulsions journal May 1996
The Rheology of Bimodal Mixtures of Colloidal Particles with Long-Range, Soft Repulsions journal February 1999
Microstructure of shear-thickening concentrated suspensions determined by flow-USANS journal March 2009
Controlled growth of monodisperse silica spheres in the micron size range journal January 1968
The rheology of a sterically stabilized suspension at high concentration journal April 1992
Preparation of monodisperse silica particles: Control of size and mass fraction journal August 1988
Chemical and physical control of the rheology of concentrated metal oxide suspensions journal May 2001
Modelling the zero shear viscosity of bimodal high solid content latex: Calculation of the maximum packing fraction journal September 2006
Designing colloidal suspensions for directed materials assembly journal February 2011
The effect of Brownian motion on the bulk stress in a suspension of spherical particles journal November 1977
The Huggins Coefficient for the Square-Well Colloidal Fluid journal October 1994
Colloidal Dispersions in Polymer Melts journal July 2006
Dynamics of Tracer Particles in Gel-like Media journal December 2008
Nanorheology of Confined Polymer Melts. 1. Linear Shear Response at Strongly Adsorbing Surfaces journal October 1994
Nanorheology of Confined Polymer Melts. 2. Nonlinear Shear Response at Strongly Adsorbing Surfaces journal October 1994
Binary mixtures of monodisperse latex dispersions. 2. Viscosity journal October 1992
Poly(ethylene oxide)/Silica Nanocomposites:  Structure and Rheology journal December 2002
Connecting the Wetting and Rheological Behaviors of Poly(dimethylsiloxane)-Grafted Silica Spheres in Poly(dimethylsiloxane) Melts journal November 2006
Polymer Dynamics in PEG-Silica Nanocomposites: Effects of Polymer Molecular Weight, Temperature and Solvent Dilution journal May 2012
Role of Particle Size and Polymer Length in Rheology of Colloid–Polymer Composites journal December 2012
Rheology and Microstructure of an Unentangled Polymer Nanocomposite Melt journal December 2008
Rheology and Microstructure of Entangled Polymer Nanocomposite Melts journal November 2009
Dense Random Packing of Binary Mixtures of Spheres journal August 1965
Effects of shear induced crystallization on the rheology and ageing of hard sphere glasses journal January 2008
Two step yielding in attractive colloids: transition from gels to attractive glasses journal January 2011
Rheology of high density glass of binary colloidal mixtures in unentangled polymer melts journal January 2013
Collisions, caging, thermodynamics, and jamming in the barrier hopping theory of glassy hard sphere fluids journal October 2007
Relationships between the single particle barrier hopping theory and thermodynamic, disordered media, elastic, and jamming models of glassy systems journal October 2007
Theory of gelation, vitrification, and activated barrier hopping in mixtures of hard and sticky spheres journal February 2008
Hard sphere colloidal dispersions: Viscosity as a function of shear rate and volume fraction journal November 1985
Viscoelastic response of hyperstar polymers in the linear regime journal July 1999
Colloidal gelation and non-ergodicity transitions journal July 2000
Colloidal glass transition in unentangled polymer nanocomposite melts journal June 2009
Yielding in dense suspensions: cage, bond, and rotational confinements journal December 2010
Higher-order glass-transition singularities in colloidal systems with attractive interactions journal December 2000
Effect of composition changes on the structural relaxation of a binary mixture journal February 2003
Effect of bond lifetime on the dynamics of a short-range attractive colloidal system journal October 2004
Strain softening, yielding, and shear thinning in glassy colloidal suspensions journal February 2005
Structure and dynamics of biphasic colloidal mixtures journal June 2008
Cooperative activated dynamics in dense mixtures of hard and sticky spheres journal November 2008
Effect of mixing and spatial dimension on the glass transition journal August 2009
Activated dynamics in dense fluids of attractive nonspherical particles. I. Kinetic crossover, dynamic free energies, and the physical nature of glasses and gels journal April 2011
Glass Formation and Shear Elasticity in Dense Suspensions of Repulsive Anisotropic Particles journal July 2010
Experimental Phase Diagram of a Binary Colloidal Hard-Sphere Mixture with a Large Size Ratio journal August 1995
Linear Viscoelasticity of Colloidal Hard Sphere Suspensions near the Glass Transition journal October 1995
Glassy Dynamics and Flow Properties of Soft Colloidal Pastes journal February 2003
Nonlinear rheology of model comb polymers journal September 2009
Nonlinear rheology of colloidal gels with intermediate volume fraction journal May 2011
Viscoelastic behavior of concentrated spherical suspensions journal May 1994
High frequency modulus of hard sphere colloids journal November 1994
Nonequilibrium behavior of dense suspensions of uniform particles: Volume fraction and size dependence of rheology and microstructure journal January 1995
Reversible shear thickening in monodisperse and bidisperse colloidal dispersions journal September 1996
Rheology of dense suspensions of platelike particles journal November 1996
Rheology of suspensions of weakly attractive particles: Approach to gelation journal November 1998

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