Enabling Superior Thermo-Oxidative Resistance Elastomers Based on a Structure Recovery Strategy

Area of Science:

• Materials Science
• Polymer Chemistry
• Mechanical Engineering

Background:

• Thermo-oxidative processes degrade elastomers by breaking main chains and crosslinks.
• Conventional anti-aging methods fail to address the structural damage and subsequent mechanical property deterioration.
• Self-healing principles offer a potential solution for restoring elastomer integrity.

Purpose of the Study:

• To propose a structure recovery strategy for elastomers damaged by thermo-oxidative processes.
• To enhance the thermo-oxidative resistance and mechanical properties of elastomers.
• To bridge the gap between self-healing theory and practical applications in material science.

Main Methods:

• Utilizing the high reactivity between 1,3-diisopropenylbenzene and free radicals for structural repair.
• Implementing a self-healing strategy inspired by biological repair mechanisms.
• Analyzing changes in topological structure during the recovery process.

Main Results:

• Achieved high recovery efficiency for damaged elastomer structures, ranging from 83% to 118%.
• Significantly improved mechanical properties, with tensile strength increasing from 18.5 to 29.6 MPa.
• Demonstrated enhanced thermo-oxidative resistance in elastomers through structural recovery.

Conclusions:

• The proposed structure recovery strategy effectively restores elastomer integrity after thermo-oxidative damage.
• This approach leads to superior thermo-oxidative resistance and enhanced mechanical performance in elastomers.
• The findings support the practical application of self-healing concepts in developing advanced materials.