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- W1991345963 abstract "The structure of void space in two- and three-dimensional (3D) polymer solutions is studied using Voronoi tessellation and percolation theory. The polymer molecules are modeled as freely jointed chains of $N$ tangent hard disks (two dimensions) or spheres (three dimensions). Polymer chains are equilibrated via Monte Carlo simulations and the pore space in configurations of equilibrated chains is mapped using Voronoi tessellation. In $d$ dimensions a Voronoi vertex is the center of the sphere tangent to the $d+1$ nearest monomers. An edge of the Voronoi diagram is the shortest route between two neighboring vertices. The edge is considered connected if a monomer can pass through and disconnected otherwise. The Voronoi construction is used to calculate the percolation threshold of the void space. The most interesting result is that the polymer area fraction at the percolation threshold is a nonmonotonic function of $N$ in two dimensions but monotonically reaches a constant value in three dimensions. The crossover behavior of the percolation threshold is also observed in pseudo-3D. The pore size distribution decreases monotonically with increasing pore size. This is markedly different from that in configurations of hard disks (monomeric fluid) where the pore size distribution is peaked at finite size." @default.
- W1991345963 created "2016-06-24" @default.
- W1991345963 creator A5024538833 @default.
- W1991345963 creator A5051680576 @default.
- W1991345963 date "2010-03-08" @default.
- W1991345963 modified "2023-09-25" @default.
- W1991345963 title "Structure of void space in polymer solutions" @default.
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- W1991345963 doi "https://doi.org/10.1103/physreve.81.031801" @default.
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