Entanglement Dynamics in Ultra-High Molecular Weight Polyethylene and its Composites with Graphene Oxide
Ultra-High Molecular Weight Polyethylene (UHMWPE) is an engineering polymer which is used in a wide range of applications such as medical implants or bullet-proof vests. However, when melted, its extremely long chains lead to a high density of entanglements that complicates processing. Our group has developed a controlled synthesis method that reduces remarkably the number of entanglements in the amorphous phase. In this experiment, we will characterize for the first time disentangled UHMWPE using neutron spin echo (NSE) spectroscopy and its composites with reduced graphene oxide (rGON). Backed by rheology measurements, we expect to see a slow down of the entanglement dynamics in the presence of rGON, which affects strongly the chain confinement. This experiment will be the link between the rheological response and the microscopic chain dynamics picture provided by NSE, and a significant advance in the understanding of the behaviour of entangled polymer melts in the presence of nanofillers.
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MARTIN FABIANI Ignacio; Stavros X. Drakopoulos; FORTE Giuseppe; HOFFMANN Ingo and RONCA Sara. (2018). Entanglement Dynamics in Ultra-High Molecular Weight Polyethylene and its Composites with Graphene Oxide. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-11-1862
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