1、Investigation of the performance evolution mechanism of epoxy asphalt

To determine the optimal material composition, mechanical properties, curing mechanisms, viscosity characteristics, and microstructure of epoxy asphalt binder (EAB) under varying curing agent contents were investigated.

2、Influence of different composite curing agents on the rapid curing

To address this issue, this study demonstrated that by using a reasonable combination of a slow curing agent (type A) and a fast curing agent (type B), it is possible to achieve a balance between rapid curing and high mechanical performance.

3、A review of the curing rate and mechanical properties of epoxy resin on

The amine curing agent is one of the most promising high-performance curing agents for room-temperature curing application of epoxy resin, but there are many defects such as greater brittleness after curing, slightly poorer impact resistance, greater toxicity and volatility, etc.

4、Effect of Curing Agent Dosage on Fire Resistance of Waterborne Epoxy

PDF | On Mar 18, 2022, Jingying Wang and others published Effect of Curing Agent Dosage on Fire Resistance of Waterborne Epoxy Coating | Find, read and cite all the research you need on...

5、The study of curing behavior and thermo

Moreover, relying solely on experimental methods to elucidate the relationship between curing agent structures and the performance of epoxy systems has inherent limitations and necessitates further exploration.

A review of the curing rate and mechanical properties of epoxy resin on

In addi-tion, the relationship between curing rate and mechanical properties of epoxy composites under diferent influencing factors is reviewed. The review aims to provide research ideas for obtaining advanced structural composites with fast curing and excellent mechanical properties.

The influence of curing agents in the impact properties of epoxy resin

TL;DR: In this article, the impact properties of epoxy resin nanocomposites (EPNCs) with different curing agents and reinforced with alumina nanoparticles (NPs) were investigated.

Effect of Curing Agent Type on Curing Reaction Kinetics of Epoxy Resin

In this paper, low molecular weight polyamides, aromatic amines and anhydrides were selected as three kinds of curing agents and their isothermal viscosity-time properties were studied to...

The effect of epoxy resin and curing agent groups on mechanical

The mechanical properties and glass transition temperatures of epoxy resin systems with different structures were compared to investigate the influence of the epoxy resin and curing agent structures on the system performance.

Effect of Curing Agent Dosage on Fire Resistance of Waterborne Epoxy

Therefore, this paper studies different proportions of waterborne epoxy emulsion and curing agent. The results show that when m (epoxy emulsion): m (curing agent) = 7:3, the fire resistance and comprehensive performance of the coating are the best.

In modern materials science, epoxy resin is widely utilized across various fields due to its exceptional physical and chemical properties. Among these, impact resistance is a critical indicator for evaluating the performance of epoxy resin. As an indispensable component in the curing process, the dosage of epoxy curing agents directly affects the final product's impact resistance. This article explores in depth the relationship between the dosage of epoxy curing agents and their impact resistance.

I. Role and Classification of Epoxy Curing Agents

Epoxy curing agents promote cross-linking reactions in epoxy resin by providing active groups, accelerating the curing process and enhancing mechanical properties, particularly impact resistance. Epoxy curing agents are primarily classified into aliphatic amines, aromatic amines, acid anhydrides, and imidazoles, each with distinct characteristics and application ranges.

II. Impact of Epoxy Curing Agent Dosage on Impact Resistance

1. Insufficient Dosage: When the dosage of epoxy curing agent is inadequate, incomplete curing reactions may leave uncross-linked molecular chains, weakening the material's mechanical strength and impact resistance. Excess resin can also lead to bubble or void formation, further reducing impact resistance.

2. Optimal Dosage: Appropriate dosage ensures full cross-linking of the resin, forming a uniform and dense network structure that significantly improves impact resistance. Within this range, the curing agent effectively participates in the reaction while maintaining flexibility and crack resistance.

3. Excessive Dosage: While excess curing agent increases hardness and strength, it also enhances brittleness and fragility. Overcuring causes internal stress concentration, making the material more prone to fracture under impact. Thus, excessive dosage reduces impact resistance.

III. Factors Affecting Epoxy Curing Agent Dosage

1. Resin Type: Different epoxy resins require varying curing agent amounts. For example, aromatic epoxy resins typically need higher dosages to achieve similar cross-linking densities.

2. Environmental Conditions: Temperature and humidity influence the curing agent's reaction rate and efficiency. Higher temperatures accelerate reactions, while lower humidity reduces curing agent volatilization.

3. Product Shape and Size: Larger or more complex products may require additional curing agents to ensure adequate cross-linking density.

IV. Practical Considerations

1. Curing Agent Selection: Choose curing agents suitable for the epoxy resin type and application to optimize impact resistance.

2. Dosage Control: Follow recommended ratios strictly during preparation to avoid under- or over-curing.

3. Environmental Adjustments: Account for environmental changes (e.g., temperature, humidity) during application, adjusting dosage as needed to maintain performance stability.

The dosage of epoxy curing agents directly impacts the impact resistance of epoxy resin. Optimal dosage ensures robust cross-linking and enhanced mechanical properties, while insufficient or excessive amounts compromise performance. in practice, curing agent dosage must be carefully adjusted based on resin type, environmental conditions, and product requirements to achieve peak impact resistance.