A healable thermoset possessing shape-memory effect assisted recovery efficiency via thiol-click and diels-alder reaction between furanic groups and bismaleimide crosslinker

Abstract

Introduction: This study elucidates a convenient and uncomplicated synthesis methodology for acquiring novel thermally self-reparable polymer materials exhibiting concurrent efficiency in healing and commendable mechanical properties. This concept was developed through the utilization of the "thio-click" mechanism and the Diels-Alder reaction between polycaprolactone-bisfuran and bismaleimide to produce preliminary products, employing tris-furanic acid as a crosslinker reagent. Investigate the mass ratios of two precursors, PCL-bisfuran and trisfuran, to find the optimal material system (evaluated based on mechanical properties, shape memory, and self-healing capabilities).

Methods: In this research, the intermediate products and final material were characterized via proton nuclear magnetic resonance (1H-NMR) to accurately identify the chemical structures. Tensile strength machinery was used to record and evaluate the healing efficiency. The obtained network exhibited self-recovery damage ability under mild temperatures via optical microscopy and tensile analysis.

Result: This study was successfully performed due to obtaining accurate product chemical structures, showing a mechanical recovery efficiency of 70–80% and good crack healing at 70 °C in 30 minutes.

Conclusion: This concept was intended to partially contribute to the advancement of self-healing polymer research and its applications in various fields.