1、Synthesis and application of epoxy resins: A review
The final properties of cured epoxy resins are affected by the type of epoxy resin, curing agent, and curing process. This paper aims to review the synthesis, curing process, and application of epoxy resins.
2、Synthesis and Property Analysis of a Novel Epoxy Composite Curing Agent
In this study, a novel low-temperature fast-curing EP agent was synthesized based on Mannich’s reaction with thiourea, polyamine, formaldehyde, phenol and benzyl alcohol.
3、Effect of the Structure of Epoxy Monomers and Curing Agents: Toward
The effect of the structures of epoxy monomers and curing agents regarding the intrinsic thermal conductivity, dielectric properties, insulation performance, thermomechanical properties, thermal stability, and hydrophobicity of the prepared epoxy resins was systematically explored.
Synthesis of polyfunctional amines as curing agents and its effect on
We investigated the effects of the curing agents on the mechanical properties of epoxy, including tensile strength, flexural strength, and impact strength.
Lysine
In this study, an epoxy resin with photoluminescence properties was obtained by curing bisphenol A diglycidyl ether (BADGE) with the novel curing agent ACL blended with the traditional polyether amine (PEA400) as the curing agents.
Synthesis and Property Analysis of a Novel Epoxy Composite Curing Agent
In this study, a novel low-temperature fast-curing EP agent was synthesized based on Mannich’s reaction with thiourea, polyamine, formaldehyde, phenol and benzyl alcohol.
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.
Synthesis of epoxy curing agents containing different ring structures
Two kinds of aliphatic epoxy curing agents containing ring structures were synthesized from rosin acid and isosorbide, respectively. They were cured with diglycidyl ether bisphenol A (DER331) and the ultimate propertied of the cured resins were investigated.
Synthesis and Characterization of a Novel Curing Agent for Epoxy Resin
In this study, a novel curing agent was developed using Zeolitic imidazolate framework-8 (ZIF-8) and 1-ethyl-3-methylimidazolium acetate ( [Emim] [Ac]). [Emim] [Ac]@ZIF-8 serves as both a functional filler and a curing agent for preparing [Emim] [Ac]@ZIF-8/EP.
A critical review of dynamic bonds containing curing agents for epoxy
Particular emphasis is given to synthesis approaches and curing performances of intrinsically recyclable epoxy curing agents for the development of next-generation epoxy thermosets.
In modern industrial and construction fields, epoxy resins are widely utilized due to their exceptional physical and chemical properties, such as high adhesiveness, excellent mechanical performance, electrical insulation, and corrosion resistance. These characteristics make them indispensable components in many high-performance materials. The curing process of epoxy resins is a critical step in their application, and epoxy curing agents play a vital role in this process. This article explores the synthesis principles of epoxy curing agents and their impact on the curing of epoxy resins.
1. Basic Concept of Epoxy Curing Agents
Epoxy curing agents are substances that promote chemical reactions in epoxy resins, typically existing in liquid or powder form. Their primary function is to react with epoxy groups in the resin, forming a stable polymer network structure and achieving material curing. Epoxy curing agents vary widely in type and can be classified into categories such as aliphatic amines, aromatic amines, anhydrides, and acid-alcohol esters, depending on their chemical composition.
2. Synthesis Principles of Epoxy Curing Agents
The synthesis of epoxy curing agents is based on chemical reaction principles. During synthesis, appropriate raw materials—such as phenolic resins, multifunctional alcohols, and polybasic acids—are selected. These materials undergo chemical reactions to form prepolymers, which are further polymerized into high-molecular-weight epoxy resins. Epoxy curing agents act as catalysts or initiators in the polymerization process, facilitating the reaction to proceed in the desired direction and ultimately producing a cured epoxy resin with the required properties.
3. Mechanism of Action of Epoxy Curing Agents
Epoxy curing agents catalyze the curing process through two main mechanisms: providing active centers and regulating reaction rates. In the curing of epoxy resins, the epoxy groups are the key reactive sites, while the curing agents supply the necessary active centers. When mixed with epoxy resin, the reactive components of the curing agent rapidly react with the epoxy groups, forming a stable cross-linked structure. This grants the material the required mechanical strength and chemical stability.
4. Selection and Application of Epoxy Curing Agents
When selecting epoxy curing agents, factors such as type, molecular weight, functionality, viscosity, volatility, and compatibility with the epoxy resin must be considered. Different epoxy systems may require specific curing agents for optimal results. Additionally, the dosage of the curing agent affects both the curing process and the final product’s performance, necessitating precise control based on experimental data.
The synthesis principles of epoxy curing agents are central to the curing of epoxy resins. By choosing appropriate curing agents, the curing process can be effectively promoted, resulting in composite materials with superior properties. With advancements in technology, the development of novel epoxy curing agents continues to progress, offering broader options and possibilities for epoxy resin applications. In the future, we anticipate the emergence of more high-efficiency, environmentally friendly, and multifunctional epoxy curing agents to meet increasingly complex industrial demands.
