Threading-Induced Dynamical Transition in Tadpole-Shaped Polymers

Angelo Rosa, Jan Smrek, Matthew Turner, Davide Michieletto

Research output: Contribution to journalArticle

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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 rheological properties.
Original languageEnglish
Pages (from-to)743-748
Number of pages6
JournalACS Macro Letters
Volume 9
Issue number5
Early online date5 May 2020
DOIs
Publication statusPublished - 19 May 2020

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