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Entanglements and Fracture in Polymers.

Taewon Kang¹, Jinyue Dai¹, Yan Huang¹

¹Department of Mechanical Engineering, Northwestern University, Evanston, Illinois 60208-0001, United States.

Chemical Reviews

|October 3, 2025

Summary

This summary is machine-generated.

Polymer chain entanglements significantly influence material properties, affecting elasticity, viscoelasticity, and fracture behavior. Understanding these relationships aids in designing durable polymers and inferring structure from fracture data.

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Area of Science:

Polymer Science
Materials Science
Mechanics of Materials

Background:

Polymer chains entangle, forming a microstructure that dictates material properties.
Entangled chains cannot pass but transmit tension, influencing elastic, viscoelastic, and fracture behaviors.

Purpose of the Study:

To review recent advancements in understanding the link between polymer entanglements and fracture.
To summarize fracture properties across various polymer systems and discuss the role of entanglements.

Main Methods:

Literature review of recent research on polymer entanglements and fracture.
Synthesis of data on fracture properties (toughness, strength, etc.) in different polymer types.

Main Results:

Entanglements critically affect polymer fracture properties, including toughness, strength, and fatigue limits.
The influence of entanglements varies across polymer systems like gels, elastomers, and plastics.

Conclusions:

A comprehensive understanding of entanglement-fracture relationships is key for designing mechanically robust polymers.
Fracture properties can provide insights into the underlying polymer microstructure and entanglement network.