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Updated: Aug 27, 2025
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Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing
Published on: July 3, 2020
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Electrical Tree Characteristics of Bisphenol A Epoxy Resin/Maleopimaric Anhydride Curing System
Hechen Liu1,2, Xuan Wu2, Zhanpeng Guo3
1State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Yonghua North Street No. 619, Baoding 071003, China.
Polymers
|September 23, 2022
Summary
Using rosin-derived maleopimaric anhydride (MPA) as an epoxy resin curing agent improves electrical tree resistance. Higher MPA content increases initiation voltage and inhibits electrical tree growth, offering an eco-friendly alternative.
Area of Science:
- Materials Science
- Polymer Chemistry
- Electrical Engineering
Background:
- Epoxy resins, crucial for insulation, are typically petrochemical-based, leading to resource depletion and pollution.
- Developing sustainable alternatives from renewable resources is essential for environmental protection and resource conservation.
Purpose of the Study:
- To investigate the impact of maleopimaric anhydride (MPA), a rosin-derived curing agent, on the electrical treeing behavior of bisphenol A epoxy resin.
- To evaluate MPA as an eco-friendly alternative to petroleum-based curing agents for enhanced insulation properties.
Main Methods:
- Molecular dynamics simulations (MD) and electrical tree tests were employed under an 18-kilovolt power frequency voltage.
- The study systematically varied the content of MPA in the epoxy resin curing system.
Main Results:
- MPA content influenced the free volume and rigidity of the epoxy resin system.
- Lower MPA content (≤10%) increased free volume and decreased initiation voltage.
- Higher MPA content (≥20%) increased rigidity and significantly enhanced initiation voltage, with MPA4 showing an 11.11% improvement over the control.
- Increased MPA content inhibited electrical tree growth rate and length, leading to dendritic structures at 40% MPA.
Conclusions:
- Maleopimaric anhydride (MPA) derived from rosin is a viable, eco-friendly curing agent for epoxy resins.
- MPA enhances electrical tree resistance in epoxy insulation materials.
- This study demonstrates the potential of renewable resources in developing high-performance, sustainable insulation solutions.
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