1、The effect of processing/curing temperature and viscosity of epoxy

We hypothesized that the use of epoxy resins at high temperatures leads to an extreme decrease in resin surface tension and viscosity of epoxy, which would cause re-aggregation of graphene once dispersed.

2、Preparation of Low

In this work, a low-shrinkage, high-strength epoxy resin plugging agent was prepared based on a low-viscosity petroleum-based epoxy resin, and the curing agent and accelerator dosage were optimized, and the performance of injectable, mechanical, adhesion, and plugging was evaluated.

3、Effect of Curing Agent and Temperature on the Rheological Behavior of

The effect of curing agent (6610) content and temperature on the rheological behavior of the epoxy resin CYD-128 was studied by DSC analysis and viscosity experiments. The results show that the resin system meets the requirements of processing technology.

4、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...

Open Access proceedings Journal of Physics: Conference series

Excessive viscosity can lead to difficulties in application, while insufficient viscosity may cause sagging [9]. Furthermore, the type and concentration of the curing agent determine the specific cross-linked network structure of the epoxy resin, which in turn governs the key properties of the final coating.

The epoxy resin system: function and role of curing agents

Curing agents are critical components of aqueous epoxy resin systems. Unfortunately, its uses and applications are restricted because of its low emulsifying yields. Epoxy resins are frequently used in electrical devices, castings, packaging, adhesive, corrosion resistance, and dip coating.

Highly accurate prediction of viscosity of epoxy resin and diluent at

In the aspect of industrial application, it is particularly eager to find a model to predict the viscosity of epoxy resin systems with multiple parameters such as epoxy resin type, diluent type, temperature, and ratio of epoxy resin to diluent, etc.

Investigation of the Curing Kinetics and Rheological Behavior of

The curing reactivity and viscosity of AG-70 epoxy resin system with MNA as the curing agent and 2, 4-EMI as the accelerator promoter were measured by using non-isothermal differential scanning calorimetry (DSC) and RS600 Rotational Rheometer, respectively.

Diluents and viscosity modifiers for epoxy resins

To be effective, the diluent should react with the curing agent at almost the same rate as the resin, contribute substantial viscosity reduction at low concentrations, and be nonreactive with the resin under normal storage conditions.

Viscosity of resin system with different curing agent content at 70 °C.

The effect of curing agent (6610) content and temperature on the rheological behavior of the epoxy resin CYD-128 was studied by DSC analysis and viscosity experiments.

Epoxy resin, as a high-performance thermosetting resin, is widely used in industries such as construction, automotive, electronics, and aviation due to its excellent physical and chemical properties. The curing agent, an indispensable component of the epoxy resin system, plays a decisive role in the viscosity of the epoxy resin. This paper explores the interaction between epoxy resin and curing agents and how this interaction affects the viscosity of the curing agent.

I. Basic Concepts of Epoxy Resin and Curing Agent

Epoxy resin is a high-molecular-weight compound containing epoxy groups (-C-O-C-), characterized by high crosslinking density and superior mechanical properties. Curing agents are substances that promote the crosslinking reaction of epoxy resin, typically including anhydrides, amines, imidazoles, and other categories. When mixed with epoxy resin, these curing agents undergo chemical reactions to transition from a liquid to a solid state, resulting in materials with high strength and hardness.

II. Factors Affecting the Viscosity of Curing Agents

1. Types of Curing Agents: Different curing agents have varying functional groups and reactivity, directly influencing their viscosity. For example, anhydride-based curing agents generally exhibit higher viscosity due to their strong reaction with epoxy groups in the resin. In contrast, imidazole-based curing agents have lower viscosity because of their relatively weaker reactivity.

2. Concentration of Curing Agents: The concentration of curing agents in the epoxy resin also impacts viscosity. Typically, higher concentrations of curing agents lead to increased viscosity, as curing agent molecules tend to aggregate more readily.

3. Temperature: Temperature affects the curing rate, which in turn influences viscosity. Elevated temperatures accelerate the curing reaction, reducing the viscosity of the curing agent. This is because higher temperatures enhance molecular movement, making it harder for curing agent molecules to form stable aggregates.

III. Strategies to Improve the Viscosity of Curing Agents

To enhance the viscosity of curing agents, the following approaches can be adopted:

1. Select Appropriate Curing Agents: Choose curing agents with suitable viscosity and reactivity based on application requirements. For instance, low-viscosity curing agents may be preferred for fast-curing applications, while high-viscosity agents are更适合 for long-term performance needs.

2. Adjust Curing Agent Concentration: By controlling the ratio of epoxy resin to curing agent, viscosity can be regulated. Generally, higher curing agent concentrations increase viscosity, while lower concentrations reduce it.

3. Optimize Curing Processes: Adjusting parameters such as curing temperature and time can further improve viscosity. For example, curing at lower temperatures reduces viscosity, while extending curing time increases molecular contact opportunities, thereby lowering viscosity.

The interaction between epoxy resin and curing agents is crucial to the viscosity of the curing agent. A deep understanding of these interactions enables better mastery of curing agent characteristics, providing robust support for practical applications. By continuously optimizing curing processes and selecting appropriate curing agents, viscosity can be further improved to meet diverse application demands.