Potential Universal Extensional Rheology in Concentrated Polymeric Liquids
Nuofei Jiang
Abstract:Polymer
dynamics are special, in that they are always insensitive
to the chemical details of the monomers. However, recent experiments
show that the nonlinear extensional rheology of concentrated polymeric
liquids has a nonuniversal feature. In this work, the variation of
segmental frictional coefficient under flows, which is thought to
be the critical factor in explaining the observed nonuniversality,
is investigated in the coarse-grained (CG) molecular dynamics (MD)
simulations of polymer melts. The friction… Show more
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