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Dynamic Crosslinking: An Efficient Approach to Fabricate Epoxy Vitrimer
Yin Ran1, Ling-Ji Zheng1, Jian-Bing Zeng1
1Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
Materials (Basel, Switzerland)
|March 6, 2021
Summary
This study introduces dynamic crosslinking for efficient epoxy vitrimer fabrication. This method achieves comparable properties to static curing but with significantly improved production efficiency.
Area of Science:
- Materials Science
- Polymer Chemistry
Background:
- Epoxy vitrimers offer reprocessability, recyclability, and self-healing properties.
- Traditional static curing methods limit production efficiency.
Purpose of the Study:
- To develop a more efficient method for fabricating epoxy vitrimers.
- To investigate the feasibility of dynamic crosslinking for epoxy vitrimer production.
Main Methods:
- Fabrication of epoxy vitrimers using diglycidyl ether of bisphenol A and sebacic acid.
- Utilizing zinc acetylacetonate as a transesterification catalyst.
- Employing dynamic crosslinking in a torque rheometer at 180 °C for ~11 min.
Main Results:
- The optimal dynamic crosslinking conditions were identified.
- Dynamic crosslinking resulted in a stable gel fraction under compression molding.
- Epoxy vitrimers fabricated via dynamic crosslinking exhibited comparable properties to those from static curing.
Conclusions:
- Dynamic crosslinking is an efficient technique for epoxy vitrimer fabrication.
- This method overcomes the limitations of low production efficiency associated with static curing.
