1、Polyethyleneimine modified ammonium polyphosphate toward polyamine

To expand the application of ammonium polyphosphate (APP) in epoxy resin (EP), hyperbranched polyethyleneimines (PEI) were selected to modify it via cation exchange reaction.

2、Polysilazane

POLYAMINE HARDENERS MODIFIED WITH POLYSILAZANE FOR EPOXY RESINS. A reaction product of an organic polyamine and a polysilazane, characterized in that it comprises at least one newly formed silicon-nitrogen bond.

3、Epoxy Additives and Polyamides

Complex modified amines and polyamides capable of emulsifying and curing liquid epoxy resins at ambient temperature. Also used with solid resins including a high molecular weight waterborne dispersion included in this product guide.

Polysilazane

Assessment of relative reactivities and kinetics of various polyamine and polyamide hardeners with epoxy resins for designing high performance epoxy coatings using differential scanning calorimetry [J] .

<span style="">胺类环氧树脂固化剂改性研究进展</span

The epoxy resin materials prepared with traditional curing agent have problems of poor mechanical and thermal properties. The comprehensive properties of epoxy resin system can be effectively improved by using amine-modified curing agents.

Synthesis of polyfunctional amines as curing agents and its effect on

A curing agent is required to cure an epoxy resin, but a few curing agents also improve the mechanical properties of the resin. In addition, it is rare to find hardeners containing multiple amines, which can be used to form high cross-link densities.

Kinetics of thermal degradation, adhesion and dynamic

In this work, kinetics of thermal degradation, adhesion, and dynamic-mechanical properties of polyetheramine (PEA)-modified epoxy networks have been discussed.

Classical curing of epoxy modified lignin with polyamine for new Epoxy

Further this product was reacted with the lignin-amine to give the new epoxy-polyimine composites. This study evaluated the curing of bio-based epoxy resins derived from lignin with aromatic and an aliphatic amine. The thermal stability of the cured lignin-based epoxy samples was evaluated.

Amine Curing Agents

These curing agents offer several advantages over traditional hardeners, including increased resistance to moisture, UV light, and other environmental factors. Additionally, they provide excellent adhesion and can improve the overall performance of epoxy-based products.

Journal of Applied Polymer Science

A curing agent is required to cure an epoxy resin, but a few curing agents also improve the mechanical properties of the resin. In addition, it is rare to find hardeners containing multiple amines, which can be used to form high crosslink densities.

In modern materials science, epoxy resins are renowned for their excellent mechanical properties, electrical insulation, and chemical stability. these advantages often come with drawbacks such as high brittleness and poor thermal stability, which limit their applications in more demanding environments. To overcome these challenges, scientists have proposed an innovative solution: modifying epoxy resins with polyamine resins. This modification not only significantly enhances the comprehensive performance of epoxy resins but also expands their application range, making them a critical matrix for high-performance composite materials.

Polyamine resins are high-molecular-weight polymers synthesized from multifunctional compounds and amine-based substances. Their molecular structures contain a large number of polar nitrogen and carbon atoms, endowing them with strong polarity and hydrophilicity. When mixed with epoxy resins, polyamine resins can interpenetrate to form tight interfacial bonds, thereby markedly improving the mechanical properties of the material.

The effects of polyamine resin modification on epoxy resins are primarily reflected in the following aspects:

1. Enhanced Toughness: The incorporation of polyamine resins effectively reduces the brittleness of epoxy resins, enabling better toughness under impact loads. This is due to the polar groups in polyamine resins, which provide additional chemical bonding and strengthen the overall integrity of the material.

2. Improved Thermal Stability: The addition of polyamine resins significantly enhances the thermal stability of epoxy resins. Under high-temperature conditions, polyamine resins protect the epoxy matrix from decomposition or softening, preserving the material’s physical and chemical properties.

3. Increased Chemical Resistance: Polyamine-modified epoxy resins exhibit stronger resistance to chemical corrosion. The polar groups in polyamine resins react with environmental chemicals to form stable bonds, preventing harmful substances from eroding the material.

4. Optimized Mechanical Performance: By adjusting the ratio of polyamine resin to epoxy resin, mechanical properties such as hardness, elastic modulus, and tensile strength can be precisely controlled. This tunability enables modified epoxy resins to meet diverse application requirements.

5. Cost Reduction: While the introduction of polyamine resins increases production costs, optimizing formulations and processes can effectively control expenses. Additionally, the superior performance of modified epoxy resins improves their cost-performance ratio, offering a competitive edge in the market.

6. Expanded Application Fields: Modified epoxy resins, thanks to their excellent comprehensive properties, are widely used in aerospace, automotive manufacturing, electronics, construction, and other fields. For example, in aerospace, they can be used to fabricate lightweight, high-strength structural components; in automotive manufacturing, they serve in engine parts and body structures; in electronics, they are employed for circuit boards and packaging materials; and in construction, they contribute to high-strength building materials and decorative finishes.

7. Environmental Friendliness: Polyamine-modified epoxy resins are easy to recycle during production and free of toxic substances. This reduces environmental pollution and aligns with contemporary pursuits of sustainable development.

Despite the advantages of polyamine-modified epoxy resins, practical applications require attention to key factors. First, selecting appropriate polyamine resin types and ratios is crucial for optimal results. Second, refining production processes ensures high-quality modified epoxy resins. Long-term performance testing is also necessary to guarantee stability and reliability in real-world use.

polyamine resin-modified epoxy resins represent a groundbreaking advancement in material solutions. By incorporating polyamine resins, the toughness, thermal stability, chemical resistance, and mechanical properties of epoxy resins are significantly improved, unlocking broad application potential across multiple domains. With technological progress and growing market demands, polyamine-modified epoxy resins are poised to become a shining gem in the future of high-performance composite materials.