Entanglement Length Scale Separates Threading from Branching of Unknotted and Non-concatenated Ring Polymers in Melts
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DOI: 10.1021/acs.macromol.2c01264
Abstract: Current theories on the conformation and dynamics of unknotted and non-concatenated ring polymers in melt conditions describe each ring as a tree-like double-folded object. While evidence from simulations supports this picture on a single ring… read more here.
Keywords: ring polymers; concatenated ring; scale; unknotted non ... See more keywords
Random Knotting in Fractal Ring Polymers
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DOI: 10.1021/acs.macromol.2c01676
Abstract: Many ring polymer systems of physical and biological interest exhibit both pronounced topological effects and nontrivial self-similarity, but the relationship between these two phenomena has not yet been clearly established. Here, we use theory and… read more here.
Keywords: random knotting; knotting fractal; ring polymers; fractal ring ... See more keywords
Nanoparticle Motion in Entangled Melts of Linear and Nonconcatenated Ring Polymers
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DOI: 10.1021/acs.macromol.6b02632
Abstract: The motion of nanoparticles (NPs) in entangled melts of linear polymers and nonconcatenated ring polymers are compared by large-scale molecular dynamics simulations. The comparison provides a paradigm for the effects of polymer architecture on the… read more here.
Keywords: motion; nonconcatenated ring; melts linear; entangled melts ... See more keywords
Topology-Sensitive Microfluidic Filter for Polymers of Varying Stiffness
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DOI: 10.1021/acsmacrolett.7b00768
Abstract: The separation of polymers based on their size, rigidity, and topology is an essential but also highly challenging task for nanoscience and engineering. Using hybrid molecular dynamics simulations that correctly take into account hydrodynamics, we… read more here.
Keywords: topology sensitive; sensitive microfluidic; filter polymers; topology ... See more keywords
Scalable Synthetic Route to PDMS Ring Polymers in High Yields from Commercially Available Materials Using the Piers-Rubinsztajn Reaction
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DOI: 10.1021/acsomega.2c05996
Abstract: While cyclic polymers have intrigued researchers for their novel set of architecture-driven rheological interactions, the possibility of incorporating them in topological systems has been limited by the availability of large ring polymers. Thus, the need… read more here.
Keywords: ring polymers; pdms ring; scalable synthetic; synthetic route ... See more keywords
Sorting ring polymers by knot type with modulated nanochannels.
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DOI: 10.1039/c6sm02551j
Abstract: In this theoretical study we discuss a novel method for sorting ring polymers according to their topological, knotted state. The proposed approach harnesses the rich dynamical behaviour of polymers confined inside spatially-modulated nanochannels. The longitudinal… read more here.
Keywords: polymers knot; chain length; sorting ring; topology ... See more keywords
Topological free volume and quasi-glassy dynamics in the melt of ring polymers.
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DOI: 10.1039/c8sm00968f
Abstract: Motivated by recent observations that non-concatenated ring polymers in their dense solution exhibit a glass-like dynamics, we propose a free volume description of the motion of such rings based on the notion of topological volume.… read more here.
Keywords: volume; topological free; free volume; glassy ... See more keywords
To thread or not to thread? Effective potentials and threading interactions between asymmetric ring polymers
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DOI: 10.1039/d2sm01177h
Abstract: We use computer simulations to study a system of two unlinked ring polymers, whose length and bending stiffness are systematically varied. We derive the effective potentials between the rings, calculate the areas of minimal surfaces… read more here.
Keywords: ring polymers; thread thread; thread effective; effective potentials ... See more keywords