1、Mechanical and chemical properties of matrix composite: Curing agent

From the data and graphs produced from the measurement of moisture content, it is showed that there is a correlation between the effect of the mixing ratio of epoxy: curing agent on the moisture content of the epoxy matrix.

2、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.

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

Study on the Effect of Absorbing Moisture of Anhydride Curing Agent on the Dielectric Properties of Epoxy Resin Insulation Materials | IEEE Conference Publication | IEEE Xplore

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

Abstract The curing rate of epoxy resins is a critical parameter that significantly influences the curing properties of polymer matrix composites (PMCs). It plays a vital role in meeting high-performance requirements, particularly in achieving rapid development of high modulus.

Influence of different composite curing agents on the rapid curing

In particular, effective formulations are designed for mixing fast and slow curing agents, studying their effects on the curing behavior, curing quality, and mechanical properties of epoxy resins and elucidating their influence mechanisms.

Curing

In this work, the effects on the curing-dependent modulus and the internal stress development of the epoxy/crosslinker chemistry, curing temperature, relative humidity, filler conditions, and initial solvent concentration, are studied.

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.

(PDF) Effect of curing on the hygrothermal behaviour of epoxy and its

The diffusivity constant and the moisture equilibrium content of the epoxy resin and its composite for all the cases are compared and discussed.

Synthesis and Property Analysis of a Novel Epoxy Composite Curing Agent

The compounding method was used to improve the reactivity of EP composite curing agents, which effectively solved the rapid curing issue of marine sand under complex conditions such as low temperature and high moisture content.

Epoxy Curing Agents

Clear and pigmented coatings based upon Amicure® IC curing agents exhibit very rapid hardness development, excellent low temperature cure, very good color and UV stability and excellent surface appearance.

Epoxy curing agents play a critical role in modern industry, particularly in the manufacture of epoxy resin composites. They not only affect the physical and chemical properties of materials but also directly influence the quality and safety of products. Moisture content, a key indicator of water presence in materials, has a profound impact on the performance of epoxy curing agents. This article explores the importance of moisture content in epoxy curing agents, its mechanisms of impact, and effective methods for controlling this parameter.

I. The Importance of Moisture Content in Epoxy Curing Agents

Moisture content is a crucial factor determining the performance of epoxy curing agents. First, it directly affects the viscosity of the curing agent, which in turn influences its dispersibility and fluidity within the resin system. High moisture content can lead to excessive viscosity, reducing fluidity, increasing construction difficulty, and even causing curing failure. Conversely, low moisture content may result in overly diluted curing agents, preventing sufficient cross-linking network formation and compromising the final product's performance.

Second, moisture content significantly impacts the curing process. Under optimal moisture levels, curing agents react rapidly to form stable chemical bonds, enabling fast material curing. excessively high or low moisture content can disrupt the curing process, leading to extended curing times or incomplete curing, which deteriorates product quality and performance.

Additionally, moisture content may affect material stability. In some cases, excessive moisture can cause deterioration during storage and use, such as mold growth or caking, which not only harms appearance but also undermines performance. Thus, strict control of moisture content in epoxy curing agents is essential for ensuring product quality.

II. Factors Affecting Moisture Content in Epoxy Curing Agents

Moisture content in epoxy curing agents is influenced by multiple factors, including raw material quality, production processes, and environmental conditions.

1. Raw Material Quality The quality of raw materials is the primary determinant of moisture content. Variations between suppliers can lead to differences in initial moisture levels. For example, raw materials with high inherent moisture may still exceed standards after drying, even if processed.

2. Production Processes Improper drying processes during manufacturing can leave residual moisture in curing agents. Additionally, poor mixing uniformity may create localized regions with high moisture content, affecting overall moisture levels.

3. Environmental Conditions Fluctuations in temperature and humidity can alter moisture evaporation rates, causing variability in moisture content. atmospheric moisture may penetrate curing agents through condensation, increasing their moisture levels.

III. Effective Control of Moisture Content in Epoxy Curing Agents

To maintain ideal moisture content in epoxy curing agents, the following measures are recommended:

1. Select High-Quality Raw Materials Source materials from reliable suppliers and conduct rigorous quality testing. Use appropriate drying techniques to reduce initial moisture content in raw materials.

2. Optimize Production Processes Strictly control temperature and duration in drying processes to ensure thorough moisture removal. Enhance mixing procedures to avoid localized moisture accumulation.

3. Improve Storage Conditions Store prepared epoxy curing agents in dry environments to prevent humidity-induced moisture fluctuations. Regularly inspect container sealing to block external moisture.

4. Implement Strict Quality Control Set precise moisture content standards during production and final inspections. Reject out-of-spec batches and address issues via re-drying or formulation adjustments.

Moisture content profoundly impacts the performance of epoxy curing agents and must be严格控制 within an optimal range. By selecting high-quality raw materials, optimizing production processes, improving storage conditions, and enforcing strict quality control, moisture content can be effectively managed to ensure product stability and reliability. With advancements in technology and production techniques, future control methods for moisture content in epoxy curing agents are likely to improve, offering greater possibilities for industrial applications.