1、The effect of epoxy resin and curing agent groups on mechanical

Enhancing matrix strength can be achieved by modifying the structure of curing agents. With the widespread application of epoxy resin composites, understanding the inherent relationship between epoxy resin crosslinking structures and their properties has become increasingly crucial.

2、Molecular Dynamics Simulation of Cross‐linked Epoxy Resins: Past and

To overcome these drawbacks, it is crucial to thoroughly understand and control the formation of the cross-linked structure and the shrinkage of cured epoxy resins during the curing process.

3、Surface Chemistry and Molecular Dynamics of Epoxy Resin

The results demonstrated that post-curing enhances the properties of epoxy resin by promoting further cross-linking, reducing residual unreacted groups, and forming a more extensive covalent network.

Molecular dynamics study on the crosslinking reactions and performance

Crosslinking mechanisms between epoxy resins and amine-based curing agents were further investigated, demonstrating that side-chain structures critically influence reaction efficiency and final network properties.

Molecular picture of curing and incomplete cross

Understanding the buried interface between silica and epoxy resin is crucial for improving the performance and reliability of epoxy composites and adhesives. Here, molecular dynamics simulations were used to reveal a heterogeneous molecular picture of aggregation and curing at the amorphous silica/epoxy interface. A density increase was observed within 2 nm of the interface, driven by the ...

Study on the Construction Method of Epoxy Resin Crosslinking Model

In order to obtain an accurate epoxy resin crosslinking network model, the devel-opment of its construction method has gone through two main stages: one-step crosslinking method and iterative crosslinking method.

Molecular Dynamics Simulation of Cross‐linked Epoxy Resins: Past and

Epoxy resins are cured by the reaction between epoxy and amine compounds to form a 3D network. This review focuses on molecular dynamics simulations and how they are used to better understand the curing process and cross‐linked structures of epoxy resins.

Curing Agent: Types & Process of Curing Agents for Epoxy Resin

Explore the main types of curing agents & various crosslinking methods which help to improve the polymerization process to select the right curing agent for coating formulation.

Network structure and properties of crosslinked bio

A multiscale simulation strategy was proposed to study the curing reaction on the network formation and corresponding mechanical properties of a bio-based epoxy resin composite.

Molecular Dynamics Simulation of Cross

Methods for simulating the curing process, evaluation of thermal and mechanical properties of cured epoxy resin, application to realistic systems such as composites, and structural heterogeneity are described.

Crosslinking Reaction of Epoxy Resin with Curing Agents

Epoxy resin is a thermosetting polymer widely used in various industrial fields due to its excellent mechanical properties, electrical insulation, and chemical stability. A curing agent is a substance that promotes the hardening of epoxy resin through a chemical crosslinking reaction with its epoxide groups, transforming the resin into a rigid solid material. This paper explores the crosslinking process and applications of epoxy resin with curing agents.

1. Structure and Characteristics of Epoxy Resin

The molecular structure of epoxy resin primarily consists of epoxide groups (-C=C-), hydroxyl groups (-OH), and ether bonds (-O-). The epoxide group, the most reactive moiety, enables crosslinking reactions with other substances. The flexible molecular chain of epoxy resin endows it with adhesive and coating properties, making it suitable for manufacturing coatings, adhesives, and sealants.

2. Role and Classification of Curing Agents

Curing agents provide energy to initiate crosslinking reactions, imparting desired physical and chemical properties to epoxy resin. They are classified as follows:

1. Amine Curing Agents: Examples include toluene diisocyanate (TDI) and polyamide-amine (PAPI), which undergo ring-opening polymerization with epoxide groups to form a 3D network.

2. Anhydride Curing Agents: Examples include phthalic anhydride (PDA) and maleic anhydride (MA), which react with epoxide groups via acylation to form stable ester bonds.

3. Imidazoline Curing Agents: Examples include imidazolidinone (MQ) and PMQ, which undergo ring-opening reactions with epoxide groups to produce stable imidazoline rings.

4. Phenolic Resin Curing Agents: Examples include phenolic resin (PF), which condenses with epoxide groups to form stable phenolic rings.

3. Principles and Processes of Crosslinking Reactions

The crosslinking reaction between epoxy resin and curing agents is exothermic. The reaction involves functional groups in the curing agent chemically bonding with epoxide groups to form stable networks. The process is as follows:

1. Epoxy resin is mixed uniformly with the curing agent to form a liquid mixture.

2. Under heating or irradiation, functional groups in the curing agent activate, releasing energy.

3. Activated functional groups react with epoxide groups, forming stable chemical bonds.

4. As the reaction proceeds, the resin transitions into a solid material with desired properties.

4. Applications of Crosslinking Reactions

The crosslinking reaction is widely applied in:

1. Construction: Adhesives, sealants, and coatings for concrete, wood, plastics, etc.

2. Electronics: Circuit boards, encapsulants, and insulating coatings.

3. Automotive Manufacturing: Body parts, engine components, and seals.

4. Aerospace: Adhesives and sealants for aircraft, rockets, and satellites.

5. Medical Devices: Artificial joints, stents, and catheters.

5. Control and Optimization of Crosslinking Reactions

To optimize performance, parameters such as curing agent type, temperature, time, and additives (e.g., catalysts) must be controlled. Formulation improvements and raw material purity enhancements can further refine reaction outcomes.

The crosslinking reaction between epoxy resin and curing agents is critical to achieving its superior properties. By understanding the reaction mechanisms, processes, and applications, this knowledge guides research and development in related fields. Future advancements await more efficient, eco-friendly curing agents and epoxy products, contributing to societal progress.