1、High

Therefore, based on the current research status and existing issues, this study aims to synthesize PU terminated with C=C and -NCO groups, and use it for the chemical modification of epoxy resin to enhance the flexibility of the modified epoxy resin while maintaining other key properties.

2、Research progress on polyurethane

When epoxy resins are modified by PU and used for repair materials, PU provides flexibility while epoxy resins provide strength. Therefore, PU modification can improve epoxy toughness and ductility without compromising strength.

3、环氧基POSS改性环氧树脂的研制与性能研究

The epoxy resin was modified with the prepared EP-POSS, and the influence of the amount of EP-POSS on the adhesion, impact resistance, hydrophobicity and heat resistance of the resin coating was analyzed.

4、High

Due to the presence of both rigid cyclic maleimide units and flexible pendant butyl groups, epoxy functionalized PHMIEP can serve as an effective toughening modifier for EPs.

Toughening of Epoxy Systems with Interpenetrating Polymer

Several approaches to toughen epoxy systems have been explored, of which formation of the interpenetrating polymer network (IPN) has gained increasing attention. This methodology usually results in better mechanical properties (e.g., fracture toughness) of the modified epoxy system.

Preparation and characterization of polyurethane composite modified

To comprehensively enhance epoxy resin's performance, this investigation focuses on a composite modified epoxy resin incorporating polyurethane and nano-SiO2, examining its strength, toughness, and thermal stability.

Eco

To address these issues, in this study, we reported a facile and green approach for preparing epoxy-terminated polyurethane (EPU)-modified epoxy resins with different EPU contents. It was found that the toughness of the epoxy resin was significantly improved after the addition of EPU.

Research for Epoxy Modified Polyurethane Resin Technology

Abstract The epoxy modified polyurethane resin can be prepared under the catalyst action of isocyanate monomer and linear thermoplastic polyurethane elastomer and bisphenola epoxy resin. Through the micrograph analysis: the preparation of resin membrane surface is glossiness higher and pore less.

Structure and properties evaluation of epoxy resin modified

The present work investigates the properties and structure of epoxy resin (EP) modified with polyurethane (PUR). This latter was prepared using polymeric diphenylmethane diisocyanate and polyethylene glycol (PEG 400) or polyoxypropylene diol with different molecular weights (POPD 1002 and POPD 2002).

Toughness and its mechanisms in epoxy resins

Generally, introducing a second phase into the epoxy matrix is considered an effective means to improve the toughness of cured EPs. That is to say, an epoxy phase and a toughening phase in the cured EPs form a heterogeneous toughened system.

In the field of modern materials science, epoxy resins are widely used in industries such as electronics, construction, automotive, and aerospace due to their excellent physical and chemical properties. traditional epoxy resins suffer from brittleness and sensitivity to environmental factors, which limit their application under harsher conditions. developing a new type of epoxy resin that combines superior performance with environmental adaptability is critical. Penetrating modified epoxy resins have emerged against this backdrop, leveraging specialized molecular designs to enable resins to penetrate or diffuse under specific conditions, significantly enhancing mechanical strength, durability, and environmental resistance.

Penetrating Modified Epoxy Resins are materials engineered through molecular structure design to allow resins to penetrate into the substrate under specific conditions, forming a continuous interfacial layer. This improves the overall mechanical performance and durability of the structure. These materials typically exhibit the following characteristics:

1. Excellent Adhesion: Penetrating modified epoxy resins form strong bonds with various substrates, including metals, ceramics, and glass. Resin molecules penetrate microscopic pores in the substrate, creating a tight adhesive interface.

2. High Strength: Through molecular design, the crosslinking density and molecular chain structure of the resin can be controlled, achieving higher tensile strength and fracture resistance. Additionally, the resin’s toughness is significantly improved, allowing it to withstand greater deformation without breaking.

3. Superior Corrosion Resistance: These resins often exhibit high chemical stability, resisting erosion by various chemicals. This is attributed to the penetration of resin molecules into the substrate, forming a stable chemical barrier.

4. Fine Electrical Insulation: The three-dimensional network structure formed by cured resin molecules effectively blocks electrical current, providing excellent electrical insulation. This is crucial for the safety of electronic devices and electrical equipment.

5. Ease of Processing: Compared to traditional thermosetting epoxy resins, penetrating modified epoxy resins cure at room temperature, eliminating the need for high-temperature processing and reducing manufacturing complexity and costs.

6. Environmental Friendliness: Due to their superior performance and adaptability, these resins have minimal environmental impact during production. Post-use waste is also easier to manage, aligning with sustainable development goals.

widespread adoption of penetrating modified epoxy resins requires addressing key challenges:

1. Cost Control: Despite their advantages, production costs remain high. Scaling up and technological innovations are needed to reduce expenses.

2. Expanding Applications: Currently used in fields like electronic packaging and construction reinforcement, future efforts should explore applications in aerospace, nuclear energy, and other specialized sectors.

3. Standardization: To ensure consistent performance and reliability, a robust standardization system must be established to regulate production and application processes.

4. Technological Development: Continued innovation is essential for advancing penetrating modified epoxy resins. Investment in new materials, processes, and applications is critical to optimizing performance.

penetrating modified epoxy resins hold immense potential across multiple industries due to their unique advantages. With ongoing technological progress and market expansion, these resins are poised to play a pivotal role in future materials science and engineering applications.