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Elastic Entropic Forces in Polymer Deformation.

Vladimir I Kartsovnik1, Dimitri Volchenkov2

  • 1Gesellschaft für Kultur, Igenieurwesen und Wissenschaften e.V., Bautzner Str. 20 HH, 01099 Dresden, Germany.

Entropy (Basel, Switzerland)
|September 23, 2022
PubMed
Summary
This summary is machine-generated.

This study explores the entropic elasticity of polymers using the Frenkel-Eyring theory. It reveals how macromolecular entropic forces influence polymer melt flow and elastomer deformation, linking structure to mechanical behavior.

Keywords:
Kelvin–Voigt modelcreep predictionentropic elastic force in macromoleculeshysteresis in rubberstandard linear solid modelviscosity activation energyviscosity anomaly

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Area of Science:

  • Polymer Science and Engineering
  • Materials Science
  • Rheology

Background:

  • The elasticity of polymers is fundamentally linked to the entropy of their molecular chains.
  • Understanding polymer melt flow and elastomer deformation is crucial for material design and processing.
  • Existing models often simplify the complex interplay between molecular structure and macroscopic mechanical properties.

Purpose of the Study:

  • To analyze the entropic elasticity of long molecular chains and reticulated materials.
  • To investigate the relationship between polymer structure and deformation processes in elastomers.
  • To apply the Frenkel-Eyring molecular kinetic theory to polymer rheology.

Main Methods:

  • Analysis of polymer melt flows and elastomer deformation.
  • Application of the Frenkel-Eyring molecular kinetic theory.
  • Calculation of deformation curves using viscoelasticity models.

Main Results:

  • Deformation curves were calculated based on viscoelasticity models.
  • The activation energy of viscous flow was found to depend on elastic entropic forces.
  • Interconnections between deformation, elastomer network structure, and their mutual influence were considered.

Conclusions:

  • The entropic nature of elasticity plays a key role in polymer behavior.
  • The Frenkel-Eyring theory provides a framework for understanding polymer deformation.
  • Structural aspects of elastomer networks are intrinsically linked to their deformation characteristics.