1、Enhancing thixotropic properties of epoxy resin and mechanical

Branched polyethyleneimine functionalized CNTs (PEI@CNT) are developed as high-performance nanofillers. Simultaneously strengthening and toughening epoxy resins composites is achieved. The thixotropic property of epoxy resin is largely improved by PEI@CNT nanofillers.

2、Thixotropy of Epoxy Curing Agents

thixotropy in epoxy curing agents is a vital area of study. A deeper understanding and optimization of this property can substantially improve performance, driving advancements in related industries.

3、Thioester

This study proposes an effective solution to extend the use of thiol-type curing agents, overcoming their short shelf life and presenting a more industry-friendly method.

4、Effects of Thixotropic Agent and Storage Time on the Rheological

The results show that the two thixotropic agents play a significant role in thickening the density and modifying the thixotropy of the epoxy resin (E-44).

Investigation on Insulating Properties of Epoxy Resin Impregnated Paper

The curing formula is vital to the performance of epoxy resin impregnated paper (RIP) material. This work explored the effect of curing agents and accelerator c.

Curing kinetics and thixotropic properties of epoxy resin composites

Herein, the three different kinds of inorganic fillers are utilized to investigate their influence on the thixotropic properties and curing kinetics of epoxy-amine system.

Enhancing the mechanical strength and toughness of epoxy resins with

Herein, we report the synthesis of a new series of linear nano-modifiers that can act effectively as molecular modifiers and co-curing agents with a large aspect ratio for high performance epoxy resins.

Heterogeneous dynamics in the curing process of epoxy resins

In this study, the microscopic dynamics in the curing process of a catalytic epoxy resin were investigated under different temperature conditions utilizing X-ray photon correlation...

Studies of the Physical Properties of Cycloaliphatic Epoxy

The preparation of high performance epoxy composites for industrial applications has been extensively researched. In this report, we study the change in physical properties and reaction kinetics between epoxy resin and curing agents of similar geometry.

Advances in Toughening Modification Methods for Epoxy Resins: A

Through a detailed analysis of experimental studies, this paper highlights the effectiveness of various toughening strategies and suggests future research directions aimed at further optimizing epoxy resin toughening techniques for diverse industrial applications.

Epoxy curing agents are indispensable components of epoxy resin systems, determining the curing speed, quality, and mechanical properties of the final product. With the continuous advancement of industrial technology and growing demands for new materials, the performance requirements for epoxy curing agents are increasingly stringent. Among these, thixotropy—a critical indicator of the curing agent’s fluidity—directly impacts curing efficiency and product quality. researching and optimizing the thixotropy of epoxy curing agents holds significant theoretical and practical value.

I. Concept of Thixotropy in Epoxy Curing Agents

Thixotropy refers to the phenomenon where a substance undergoes significant changes in viscosity or flow behavior under external forces. For epoxy curing agents, thixotropy specifically describes the viscosity changes during the curing process, i.e., how the curing agent’s viscosity evolves with time or temperature under specific conditions. Excellent thixotropy enhances curing efficiency, reduces defects, and ensures stable product quality.

II. Factors Affecting Thixotropy of Epoxy Curing Agents

1. Molecular Structure: The molecular structure of epoxy curing agents directly influences thixotropy. For instance, curing agents containing long-chain alkyl groups typically exhibit better thixotropy, while those with polar groups may show poorer performance.

2. Degree of Polymerization: The degree of polymerization significantly affects thixotropy. Higher polymerization leads to larger molecular weights and improved thixotropy. excessively high polymerization can result in overly viscous curing agents, hindering practical operation.

3. Additive Types: Different additives markedly influence thixotropy. Plasticizers, for example, reduce viscosity and improve thixotropy, whereas fillers may degrade it.

4. Temperature and Shear Rate: External factors such as temperature and shear rate also play critical roles. Within a certain temperature range, thixotropy generally increases with rising temperatures; at excessively high temperatures, thixotropy may decline. Additionally, high shear rates disrupt intermolecular forces, altering thixotropic behavior.

III. Methods to Enhance Thixotropy of Epoxy Curing Agents

1. Molecular Design: Chemical modifications or synthetic strategies can be employed to design curing agents with optimized molecular structures, improving chain arrangement and intermolecular interactions to boost thixotropy.

2. Additive Incorporation: Selecting appropriate additives effectively improves thixotropy. Plasticizers reduce viscosity, while leveling agents enhance coating smoothness after curing.

3. Heat Treatment: Proper heat treatment can elevate thixotropy. High temperatures increase molecular spacing, promoting collisions and cross-linking, thereby enhancing thixotropic properties.

4. Process Parameter Control: In practice, precisely controlling curing temperature, time, and environmental conditions (e.g., humidity, oxygen content) enables effective adjustment of thixotropy to meet diverse production needs.

Thixotropy is a key factor governing the curing quality and production efficiency of epoxy curing agents. By analyzing influencing factors and implementing targeted improvements, their performance can be significantly enhanced to meet modern industrial standards. Future research should focus on novel molecular designs and advanced preparation techniques to further improve thixotropy, expanding the applications of epoxy curing agents across industries.