Related Experiment Video
Updated: Aug 13, 2025
09:06
Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing
Published on: July 3, 2020
7.3K
Curing Regime-Modulating Insulation Performance of Anhydride-Cured Epoxy Resin: A Review
Jin Li1, Hein Htet Aung1, Boxue Du1
1Key Laboratory of Smart Grid of Education Ministry, School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China.
Molecules (Basel, Switzerland)
|January 21, 2023
Summary
Optimizing the curing regime of anhydride-cured bisphenol-A epoxy resin is crucial for enhancing insulation performance in electrical systems. Proper control of mixture ratios, time, and temperature improves microstructure and prevents electrical insulation failures.
Area of Science:
- Materials Science
- Electrical Engineering
- Polymer Chemistry
Background:
- Anhydride-cured bisphenol-A epoxy resin is vital for electrical insulation but prone to failure under stress.
- Overheating and breakdown faults in epoxy resin insulation threaten system safety.
- The curing regime significantly impacts epoxy resin microstructure and performance.
Purpose of the Study:
- To review the evolution of curing kinetic models for anhydride-cured epoxy resin.
- To analyze the influence of curing regimes on insulation performance.
- To link microstructure changes to insulation performance mechanisms.
Main Methods:
- Review of curing kinetic models for epoxy resin.
- Analysis of mixture ratios, curing time, and temperature effects.
- Discussion of microstructure-performance relationships.
Main Results:
- Curing kinetic models help determine optimal curing regimes.
- Specific curing parameters (mixture ratio, time, temperature) directly affect insulation properties.
- Microstructure variations are key to understanding performance differences.
Conclusions:
- The curing regime is a critical determinant of epoxy resin insulation performance.
- Understanding curing-dependent microstructures is essential for preventing electrical failures.
- Optimized curing strategies can enhance the reliability of epoxy resin insulation.
Keywords:
anhydridebisphenol-A epoxy resincuring regimeelectrical and electronic equipmentinsulation performanceMore Related Videos
07:15A Testing Platform for Durability Studies of Polymers and Fiber-reinforced Polymer Composites under Concurrent Hygrothermo-mechanical Stimuli
Published on: December 11, 2014
13.9K
07:02The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry
Published on: August 25, 2016
13.8K
Related Concept Videos
01:26Curing Methods
111
Concrete members with a small surface-to-volume ratio are cured by oiling and moistening the forms before casting the concrete member. These forms can be left in place for a prolonged period to prevent moisture loss, and can be wetted if made of a material suitable for wetting. If the forms are removed early, the concrete member is moistened and covered with polythene sheets to maintain moisture. For large horizontal concrete surfaces exposed to dry weather, a temporary covering is suspended...
111
01:20Curing of Concrete
140
The hydration of cement takes place within the water-filled capillary pores. However, environmental elements can disrupt this process by evaporating water from the concrete surfaces. Sealed concrete with a water-cement ratio below 0.5 experiences self-desiccation, leading to water loss. The water loss in concrete is mitigated by curing. This technique involves keeping the concrete saturated to maintain the necessary temperature and moisture conditions, to optimally fill the spaces in the cement...
140
01:25Accelerated Curing of Concrete
213
Accelerating concrete curing is achieved by applying heat and additional moisture. This process accelerates the hydration of the cement, resulting in an earlier strength gain in the concrete. Steam curing is a method wherein the concrete products are either transported through a chamber on a conveyor belt or encased in plastic, allowing steam at atmospheric pressure to circulate freely around them. This process begins with a phase of moist curing that typically lasts between 3 to 5 hours, after...
213
01:21Drying Shrinkage
120
When hardened concrete is exposed to air with a relative humidity of less than 100 percent, it begins to lose the free water within its capillaries. As this water evaporates, the water initially adsorbed onto the calcium silicate hydrates migrates towards these now empty spaces and eventually evaporates as well. Over time, as more water leaves, the volume of the concrete decreases, a phenomenon known as drying shrinkage.
A portion of this drying shrinkage can be reversed; if the concrete is...
A portion of this drying shrinkage can be reversed; if the concrete is...
120
01:29Frost Resistant Concrete
117
Concrete's susceptibility to frost damage during freeze-thaw cycles demands strategic measures to enhance its frost resistance. Employing techniques like air entrainment, adjusting the water-cement ratio, proper curing, and selecting appropriate aggregates are essential.
Introducing microscopic air bubbles into the concrete mix through air entrainment creates small voids that accommodate ice expansion, thereby reducing internal pressures and preventing cracking. The optimal amount of...
Introducing microscopic air bubbles into the concrete mix through air entrainment creates small voids that accommodate ice expansion, thereby reducing internal pressures and preventing cracking. The optimal amount of...
117
01:19Retarders
93
Retarders are chemical admixtures designed to extend the setting time, which is especially useful when there is a delay in sequential concrete pours to prevent cold joints and to achieve a cohesive structure. Retarders, when used in appropriate amounts, can also enhance the architectural appearance of exposed aggregate finishes.
The function of retarders is to delay the setting of concrete, and this effect can be measured using a penetration test. The retardation process involves adding...
The function of retarders is to delay the setting of concrete, and this effect can be measured using a penetration test. The retardation process involves adding...
93