The relationship between polymer topology and bulk rheology remains a key question in soft matter physics. Architecture-specific constraints (or threadings) are thought to control the dynamics of ring polymers in ring-linear blends, which thus affects the viscosity to range between that of the pure rings and a value larger, but still comparable to, that of the pure linear melt. Here we consider qualitatively different systems of linear and ring polymers, fused together in "chimeric" architectures. The simplest example of this family is a "tadpole"-shaped polymer, a single ring fused to the end of a single linear chain. We show that polymers with this architecture display a threading-induced dynamical transition that substantially slows chain relaxation. Our findings shed light on how threadings control dynamics and may inform design principles for chimeric polymers with topologically tunable bulk theological properties.

Threading-Induced Dynamical Transition in Tadpole-Shaped Polymers / Rosa, Angelo; Smrek, Jan; Turner, Matthew S.; Michieletto, Davide. - In: ACS MACRO LETTERS. - ISSN 2161-1653. - 9:5(2020), pp. 743-748. [10.1021/acsmacrolett.0c00197]

Threading-Induced Dynamical Transition in Tadpole-Shaped Polymers

Angelo Rosa
Membro del Collaboration group
;
Jan Smrek
Membro del Collaboration group
;
Matthew S. Turner
Membro del Collaboration group
;
2020

Abstract

The relationship between polymer topology and bulk rheology remains a key question in soft matter physics. Architecture-specific constraints (or threadings) are thought to control the dynamics of ring polymers in ring-linear blends, which thus affects the viscosity to range between that of the pure rings and a value larger, but still comparable to, that of the pure linear melt. Here we consider qualitatively different systems of linear and ring polymers, fused together in "chimeric" architectures. The simplest example of this family is a "tadpole"-shaped polymer, a single ring fused to the end of a single linear chain. We show that polymers with this architecture display a threading-induced dynamical transition that substantially slows chain relaxation. Our findings shed light on how threadings control dynamics and may inform design principles for chimeric polymers with topologically tunable bulk theological properties.
9
5
743
748
https://pubs.acs.org/doi/10.1021/acsmacrolett.0c00197
https://arxiv.org/abs/1908.06638
Rosa, Angelo; Smrek, Jan; Turner, Matthew S.; Michieletto, Davide
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/112929
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