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September 5, 2025Physical Review LettersOpen Access

Flow-Driven Stretch Fluctuations Govern the Nonlinear Viscoelasticity of Elongating Associative Polymer Networks

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Authors

SLSongyue LiuTOThomas C. O’Connor

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Overview

Molecular dynamics simulations reveal broad stretch fluctuations in associative polymer networks, suggesting a new understanding of viscoelastic behavior.

Key Points

  • Nonlinear viscoelasticity is influenced by broad stretch fluctuations in associative polymer networks, highlighting their dynamic nature.
  • Simulations demonstrate a rate-dependent extensional viscosity in H-bonding networks, crucial for understanding polymer behavior.
  • The study identifies a new form of chain tumbling linked to stretch fluctuations, which affects the overall molecular response.
  • Traditional mean-field models fail to capture the extent of fluctuations observed, implying the need for advanced modeling approaches.

Cite This Study

Liu et al. (2025) studied this question.

synapsesocial.com/papers/68bb3ee82b87ece8dc9572a8https://doi.org/10.1103/kgrd-8gkb
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