A simple, efficient route to modify the properties of epoxy dynamic polymer networks

Area of Science:

• Materials Science
• Polymer Chemistry
• Sustainable Materials

Background:

• Epoxy dynamic polymer networks (DPNs) are versatile materials with tunable properties.
• Modifying DPNs can enhance their mechanical performance and processability.
• There is a growing need for energy-efficient material processing methods.

Purpose of the Study:

• To develop a simple and efficient strategy for modifying epoxy DPNs.
• To investigate the impact of incorporating epoxidized soybean oil (ESO) on epoxy DPN properties.
• To assess the potential for energy conservation during material reprocessing.

Main Methods:

• Introduction of epoxidized soybean oil (ESO) into epoxy dynamic polymer networks (DPNs).
• Characterization of mechanical properties, including elongation at break.
• Measurement of stress relaxation rates and reprocessing temperatures.

Main Results:

• Incorporation of 7.5 wt% ESO significantly improved elongation at break from 10% to 108%.
• Stress relaxation time at 120 °C decreased from 6100 s to 2570 s.
• Reprocessing temperature was reduced by 26 °C, enhancing energy efficiency.

Conclusions:

• Epoxidized soybean oil (ESO) is an effective modifier for epoxy dynamic polymer networks (DPNs).
• The modified epoxy-ESO DPNs exhibit enhanced mechanical properties, malleability, and self-healing capabilities.
• This approach offers a novel, energy-conserving pathway for fabricating high-performance epoxy-based DPNs.