Influence of Graft Density on the Viscoelastic Properties of Polymer Grafted Nanocomposites
ORAL
Abstract
Molecular dynamic simulations are used to investigate the dynamics and viscoelastic properties of polymer grafted nanocomposites (PGNs). In the current study, the PGN consists of a nanoparticle with grafted high-Tg polymer chains in a low-Tg polymer matrix. These types of PGNs have been shown to have reversible and repeatable stiffening behavior upon heating (Senses, E.; Isherwood, A.; Akcora, P. ACS Appl. Mater. Interfaces 2015, 7, 14682). The interface between the grafted and matrix polymers may influence chain dynamics and viscoelastic properties of the whole system. The influence of the graft density and graft chain stiffness on viscoelastic properties is investigated to identify the mechanism of the observed stiffening in these types of PGNs.
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Presenters
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Andrew Ehlers
Rensselaer Polytechnic Institute
Authors
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Andrew Ehlers
Rensselaer Polytechnic Institute
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Pinar Akcora
Chemical Engineering and Materials Science, Stevens Institute of Technology, Stevens Inst of Tech, Chemical and Materials Engineering, stevens institute of technology
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Rahmi Ozisik
Rensselaer Polytechnic Institute, Materials Science and Engineering, Rensselaer Polytechnic Institute, materials science and engineering, rensselaer polytechnic institute