title: Entanglement network in nanoparticle reinforced polymers.
abstract: Polymer nanocomposites have been widely studied in efforts to engineer materials with mechanical properties superior to those of the pure polymer, but the molecular origins of the sought-after improved properties have remained elusive. An ideal polymer nanocomposite model has been conceived in which the nanoparticles are dispersed throughout the polymeric matrix. A detailed examination of topological constraints (or entanglements) in a nanocomposite glass provides new insights into the molecular origin of the improved properties in polymer nanocomposites by revealing that the nanoparticles impart significant enhancements to the entanglement network. Nanoparticles are found to serve as entanglement attractors, particularly at large deformations, altering the topological constraint network that arises in the composite material.
authors: Department of Chemical Engineering, University of California, Santa Barbara, California 93106, USA.
authors: Robert A
authors: RA
authors: Riggleman
authors: Gregory
authors: G
authors: Toepperwein
authors: George J
authors: GJ
authors: Papakonstantopoulos
authors: Jean-Louis
authors: JL
authors: Barrat
authors: Juan J
authors: JJ
authors: de Pablo