1、Water absorption and property evolution of epoxy resin under

Changes in structure and properties of resin matrix caused by water absorption is one of the key factors affecting the long-term durability of fiber reinforced polymer composites used in civil engineering.

2、Moisture absorption behavior of epoxy resin cured products and its

Abstract: To investigate the moisture absorption behavior of epoxy resin and the changes in its dielectric properties post-absorption, the study developed epoxy resins with various structures by varying the type of curing agent.

3、Consequences of Humidity Cycling on the Moisture Absorption

Both infrared (IR) spectroscopy and dielectric readings were successful in establishing a strong correlation between moisture absorption, network morphology, and dielectric properties.

4、The effect of absorbed moisture and resin pressure on porosity in

During the curing process, the presence of moisture and other volatile compounds can initiate the nucleation and growth of voids. In this study, the effect of both the initial water content absorbed in the uncured resin and the pressure on the porosity development in an epoxy resin was investigated.

5、Study on the Effect of Absorbing Moisture of Anhydride Curing Agent on

Abstract: Anhydride curing agent is one of the most commonly used curing agents for the preparation of epoxy resin insulation materials, but it is easy to absorb external moisture during production, transportation and storage, which affects the dielectric properties of the final prepared epoxy resin insulation materials, due to the ...

Moisture absorption and cyclic absorption–desorption characters of

In this study, the temperature effects on moisture diffusion of epoxy resin and its glass/carbon fibre-reinforced epoxy composites in distilled water were tested.

Solutions for Tackling Moisture Absorption in Epoxy Curing Agents

This chapter summarizes the water absorption in nanocomposites based on various epoxy resin/curing agent systems and their implications on their ultimate properties.

The effect of absorbed moisture and resin pressure on porosity in

In this study, the effect of both the initial water content absorbed in the uncured resin and the pressure on the porosity development in an epoxy resin was investigated.

Enhancing epoxy resin curing: Investigating the catalytic role of water

The interaction between water and epoxy resins, a class of network polymers, is attracting increasing attention. Epoxy resins are sensitive to atmospheric moisture. The epoxy-bonded material system can absorb moisture.

Anhydride Cured Bio‐Based Epoxy Resin: Effect of Moisture on Thermal

Thus, the overall objective of the present study is to develop and optimize a thermoset based on epoxidized hemp seed oil (EHSO) and an anhydride hardener which can be applied in high-performance composites with natural fiber reinforcement.

In modern industrial manufacturing, epoxy resin curing agents, as critical chemical materials, are widely used in fields such as electronics, aerospace, automotive, and construction. Their primary function is to facilitate the transition of epoxy resin materials from a liquid to a solid state, forming robust coatings or structural components. moisture absorption during use can compromise their performance and pose safety hazards. This paper explores the causes, effects, and mitigation strategies for moisture absorption in epoxy resin curing agents, aiming to provide references for relevant industries.

I. Causes of Moisture Absorption in Epoxy Resin Curing Agents

The primary reasons for moisture absorption in epoxy curing agents include:

1. Environmental Factors: Direct exposure to atmospheric moisture leads to water absorption by the curing agent, particularly in high-humidity environments such as basements or damp warehouses.

2. Packaging Deficiencies: Inadequate sealing or non-moisture-resistant packaging materials allow ambient humidity to penetrate, resulting in moisture contamination.

3. Transport Exposure: Lack of effective moisture-proof measures during transit may expose curing agents to damp conditions in vehicles or warehouses over extended periods.

4. Improper Storage Conditions: Storing curing agents in humid environments or under unsuitable conditions increases the risk of moisture absorption.

II. Effects of Moisture Absorption

Moisture-contaminated curing agents exhibit reduced performance, including:

1. Degraded Physical Properties: Symptoms include volume expansion, slower curing rates, and reduced hardness, all of which impair product quality.

2. Chemical Changes: Moisture may trigger unwanted chemical reactions, forming new compounds that damage the final product.

3. Safety Risks: Hydrated curing agents might release hazardous gases, posing risks to human health and the environment.

III. Mitigation Strategies

To address moisture absorption issues, the following strategies are recommended:

1. Enhanced Packaging Design: Use moisture-resistant materials to prevent humidity penetration during transport and storage.

2. Optimized Storage Management: Store curing agents in dry, well-ventilated areas with controlled relative humidity to minimize environmental moisture exposure.

3. Anti-Moisture Technologies: Incorporate specialized moisture-resistant processes during production to improve the inherent hydrophobicity of curing agents.

4. Routine Testing and Maintenance: Regularly inspect curing agents for moisture content, promptly address contamination, and implement maintenance protocols to ensure stable performance.

Moisture absorption in epoxy resin curing agents is a critical issue that threatens product quality, performance, and safety. Proactive measures—such as improved packaging, stringent storage protocols, anti-moisture technologies, and regular monitoring—are essential to mitigate risks and ensure reliable supply. By addressing these challenges, the widespread application of epoxy curing agents across industries can be safeguarded.