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Jamming of Semiflexible Polymers
1Department of Physics, University of South Florida, Tampa, Florida 33620, USA.
Physical Review Letters
|February 25, 2017
Summary
Freely rotating polymers jam at lower densities than flexible ones, with rigidity significantly impacting jamming behavior and system hypostaticity. Chain length also influences jamming density and structural properties.
Area of Science:
- Polymer Physics
- Materials Science
- Statistical Mechanics
Background:
- Understanding polymer jamming is crucial for predicting material properties and solidification.
- Freely rotating polymers offer a unique model system distinct from flexible or rigid chains.
Purpose of the Study:
- To investigate the jamming transition in model freely rotating polymers.
- To determine the influence of chain length (N) and bond angle (θ₀) on jamming density (ϕⱼ).
Main Methods:
- Computational modeling of freely rotating polymer chains.
- Analysis of jamming volume fraction (ϕⱼ) as a function of chain length and bond angle.
- Examination of system hypostaticity in marginally jammed states.
Main Results:
- Jamming volume fraction (ϕⱼ) is minimal for rodlike chains (θ₀=0) and increases with θ₀.
- Freely rotating polymers exhibit high hypostaticity at jamming, even with constraints.
- Longer chains jam at lower densities and show greater hypostaticity.
Conclusions:
- Jamming behavior is strongly dependent on polymer aspect ratio and chain length.
- Fixed bond angles introduce correlations affecting jamming at lower densities.
- Findings provide insights into polymer solidification and the mechanics of jammed systems.
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