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Polymer Classification: Crystallinity

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Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
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Updated: May 22, 2026

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

Polymerlike statistical characterization of two-dimensional granular chains.

Ping-Ping Wen¹, Ning Zheng, Liang-Sheng Li

¹Key Laboratory of Cluster Science of Ministry of Education and Department of Physics, Beijing Institute of Technology, 100081 Beijing, China.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|May 17, 2012

Summary

This summary is machine-generated.

Longer granular chains exhibit lower packing density due to backbone loops when compacted. Their statistical behaviors align with theoretical polymer models, indicating jamming in granular systems.

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Published on: September 8, 2016

Area of Science:

Physics
Materials Science
Polymer Science

Background:

Granular materials exhibit complex behaviors when packed, influenced by particle shape and interactions.
Understanding packing density and structure is crucial for predicting material properties and performance.
Polymer chain configurations offer a theoretical framework for analyzing granular chain packing.

Purpose of the Study:

To experimentally investigate the statistical behaviors of granular chains during packing in a 2D container.
To determine the relationship between chain length, packing density, and structural properties.
To compare the observed behaviors with theoretical models of polymer solutions and compact polymers.

Main Methods:

Experimental investigation of granular chain packing under gravity-induced compaction.
Analysis of packing density and structure factor (g(q)).
Computation of probability distributions of distances and contact exponents.
Observation of orientational anticorrelation using bond-bond correlation functions.

Main Results:

Longer granular chains result in lower packing density due to backbone loop formation.
The structure factor exhibits scaling behavior g(q)∼q(-2), consistent with dense polymer solutions.
Computed probability distributions and contact exponents align with theoretical polymer expectations.
An orientational anticorrelation of granular chains was observed, matching 2D compact polymer models.

Conclusions:

Granular chain packing demonstrates statistical behaviors analogous to dense polymer solutions.
The jamming of granular systems can be effectively modeled using polymer physics principles.
Experimental findings support theoretical predictions for polymer chain configurations in 2D systems.