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Title: Multiscale Dynamics of Polymers in Particle-Rich Nanocomposites

Journal Article · · Macromolecules

In this paper we report on the dynamics of entangled polymers in polymer–nanoparticle composites (PNCs) with moderate and high particle loadings. Using composites comprised of poly(ethylene glycol) (PEG)-tethered silica (SiO2) nanoparticles and poly(methyl methacrylate) (PMMA), we show by means of small-angle X-ray scattering (SAXS) analysis that the nanoparticles are uniformly dispersed over a range of particle concentrations. From oscillatory shear rheology measurements, we find that the time–temperature superposition (TTS) principle holds for these SiO2-PEG/PMMA PNCs up to a particle concentration ΦG ≈ 11% where the materials begin to exhibit soft glassy rheological properties. At particle concentrations below ΦG, we take advantage of TTS to create dynamic maps for PNCs that span time scales ranging from fast segmental motions to slow terminal relaxation of polymer chains. These maps reveal that at low Φ and depending on the host polymer (PMMA) molecular weight (Mw), hairy nanoparticles may either speed up or slow down terminal relaxation of the host. In contrast, at high Φ, nanoparticles slow down polymer dynamics on intermediate and long time scales, irrespective of the host polymer Mw. The slowdown coincides with particle concentrations at which the mean interparticle spacing lies below the equilibrium tube diameter of the entangled PMMA host and is thought to reflect the onset of confinement dynamics of polymer chains in PNCs. Studies of PNCs in the confinement regime reveal important analogies between glassy attributes of 3D-confined polymer chains in nanocomposites with those of polymer thin films supported on attractive substrates.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
National Science Foundation (NSF)
Grant/Contract Number:
CBET-1512297; AC02-06CH11357
OSTI ID:
1327063
Journal Information:
Macromolecules, Vol. 49, Issue 14; ISSN 0024-9297
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

References (60)

Processing and properties of polymeric nano-composites journal November 2001
Polymer Layered Silicate Nanocomposites journal January 1996
Flammability and thermal stability studies of polymer layered-silicate (clay) nanocomposites journal September 1999
A review on polymer–layered silicate nanocomposites journal December 2008
Polymer/clay nanocomposites and their gas barrier properties journal June 2013
Microstructure and tribological behavior of polymeric nanocomposites journal April 2001
A highly reversible room-temperature lithium metal battery based on crosslinked hairy nanoparticles journal December 2015
Stress Relaxation of Star/Linear Polymer Blends journal August 2002
Entanglement friction and dynamics in blends of starlike and linear polymer molecules journal January 2001
Enthalpic Stabilization of Brush-Coated Particles in a Polymer Melt journal June 2002
Nanorod Self-Assembly for Tuning Optical Absorption journal October 2010
Phase stability and dynamics of entangled polymer–nanoparticle composites journal June 2015
Size-Dependent Particle Dynamics in Entangled Polymer Nanocomposites journal January 2016
Mobility of Nonsticky Nanoparticles in Polymer Liquids journal October 2011
Hopping Diffusion of Nanoparticles in Polymer Matrices journal January 2015
Microscopic Theory of the Long-Time Diffusivity and Intermediate-Time Anomalous Transport of a Nanoparticle in Polymer Melts journal December 2014
Monolithic Composite Electrodes Comprising Silicon Nanoparticles Embedded in Lignin-derived Carbon Fibers for Lithium-Ion Batteries journal August 2014
Cooperation between Active Material, Polymeric Binder and Conductive Carbon Additive in Lithium Ion Battery Cathode journal February 2012
Highly Stretchable and Conductive Silver Nanoparticle Embedded Graphene Flake Electrode Prepared by In situ Dual Reduction Reaction journal September 2015
A Solution Processed Flexible Nanocomposite Electrode with Efficient Light Extraction for Organic Light Emitting Diodes journal March 2014
Materials for suspension (semi-solid) electrodes for energy and water technologies journal January 2015
Nanoscale Ionic Materials journal November 2008
Tethered Nanoparticle–Polymer Composites: Phase Stability and Curvature journal April 2012
Glass-transition temperatures of compatible polymer mixtures journal February 1979
Dependence of the Fictive Temperature of Glass on Cooling Rate journal January 1976
Ideal copolymers and the second-order transitions of synthetic rubbers. i. non-crystalline copolymers journal September 1952
Compositional Variation of Glass-Transition Temperatures. 2. Application of the Thermodynamic Theory to Compatible Polymer Blends journal November 1978
Relationship between the glass transition temperature and the interaction parameter of miscible binary polymer blends journal June 1992
Influence of composition and molecular mass on the morphology, crystallization and melting behaviour of poly(ethylene oxide)/poly(methyl methacrylate) blends journal August 1984
Melting point depression in poly (ethylene oxide)-poly (methyl methacrylate) blends journal January 1982
Miscibility prediction based on the corresponding states theory: poly(ethylene oxide)/atactic poly(methyl methacrylate) system journal March 1989
Thermodynamics of blends of poly(ethylene oxide) with poly(methyl methacrylate) and poly(vinyl acetate): Prediction of miscibility based on Flory solution theory modified by Hamada journal September 1998
Interactions in mixtures of poly(ethylene oxide) and poly(methyl methacrylate) journal September 1987
Thermodynamics of poly(ethylene oxide)-poly(methyl methacrylate) blends: prediction of miscibility based on the corresponding-states theory journal July 1994
Quantitative equivalence between polymer nanocomposites and thin polymer films journal August 2005
Interface and surface effects on the glass-transition temperature in thin polymer films journal January 1994
Model polymer nanocomposites provide an understanding of confinement effects in real nanocomposites journal March 2007
Effect of strongly favorable substrate interactions on the thermal properties of ultrathin polymer films journal March 1996
Experimental Evidence for a New Parameter to Control the Glass Transition of Confined Polymers journal April 2007
Effects of confinement on material behaviour at the nanometre size scale journal April 2005
Relation between Glass Transition Temperatures in Polymer Nanocomposites and Polymer Thin Films journal August 2008
Molecular mass dependence of point-to-set correlation length scale in polymers journal August 2012
Size-Dependent Depression of the Glass Transition Temperature in Polymer Films journal July 1994
Dynamics and Rheology of Soft Colloidal Glasses journal January 2015
Dynamics of Entangled Chains in Polymer Nanocomposites journal August 2011
Nanoparticle Effect on the Dynamics of Polymer Chains and Their Entanglement Network journal September 2012
Theory of Entanglements and Tube Confinement in Rod–Sphere Nanocomposites journal October 2013
Relaxation in glassforming liquids and amorphous solids journal September 2000
Probing Slow Dynamics in Supported Thin Polymer Films journal July 2005
Glass Transition Dynamics and Surface Layer Mobility in Unentangled Polystyrene Films journal June 2010
On the Temperature Dependence of Cooperative Relaxation Properties in Glass‐Forming Liquids journal July 1965
Glass transition behavior and dynamic fragility in polylactides containing mobile and rigid amorphous fractions journal September 2008
Dielectric Spectroscopy Investigation of Relaxation in C 60 −Polyisoprene Nanocomposites journal April 2009
Glass formation and stability of polystyrene–fullerene nanocomposites journal April 2010
Slow dynamics near glass transitions in thin polymer films journal June 2001
Influence of Confinement on the Fragility of Antiplasticized and Pure Polymer Films journal July 2006
Molecular Mobility and Glass Transition of Thin Films of Poly(bisphenol A carbonate) journal January 2012
A unifying framework to quantify the effects of substrate interactions, stiffness, and roughness on the dynamics of thin supported polymer films journal June 2015
Local variation of fragility and glass transition temperature of ultra-thin supported polymer films journal December 2012
Nanoconfinement effects on the fragility of glass formation of a model freestanding polymer film journal January 2014

Cited By (7)

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Glass transition of polymers in bulk, confined geometries, and near interfaces journal January 2017
Translational and rotational dynamics of an ultra-thin nanorod probe particle in linear polymer melts journal January 2018
Strain rate and temperature dependence of the mechanical properties of polymers: A universal time-temperature superposition principle journal July 2018
Influence of molecular weight on molecular dynamics and dynamic rheology of polypropylene glycol filled with silica journal January 2018
Miscibility and Nanoparticle Diffusion in Ionic Nanocomposites text January 2018