1、Thermosetting resin modified asphalt: A comprehensive review

The material composition, modification mechanism, and curing behavior of epoxy asphalt, thermosetting polyurethane modified asphalt, unsaturated polyester modified asphalt, and other thermosetting resin modified asphalts are overviewed.

2、Thermosetting Polymer Modified Asphalts: Current Status and Challenges

To develop eco-friendly and sustainable asphalt materials, this article also reviews the use of bio-based thermosetting polymers, including epoxy resin, polyurethane and phenolic resin, in asphalt modification.

3、Polyurethane

Research on PU-modified thermosetting resins provides innovative solutions to overcome the limitations of traditional thermosetting resins. By incorporating PU, both performance and application scope are significantly expanded.

Thermosetting Polyurethane Resins as Low

In this work, thermosetting polyurethane (PU)-based resins are proposed as effective encapsulants for perovskite solar cells to prevent degradation caused by both moisture and oxygen.

Mechanical Properties and Modification Mechanism of Thermosetting

To study the mechanical properties and modification mechanism of thermosetting polyurethane (PU)-modified asphalt, the effects of polyurethane dosage on the workability of polyurethane-modified asphalt were analyzed by means of rotational viscosity tests.

Preparation Scheme Optimization of Thermosetting Polyurethane Modified

To solve the issue of the poor temperature stability of conventional modified asphalt, polyurethane (PU) was used as a modifier with its corresponding curing agent (CA) to prepare thermosetting PU asphalt.

Chemical upcycling of commodity thermoset polyurethane foams

Here we report a highly efficient chemical strategy for upcycling thermoset polyurethane foams that yields products of much higher economic values than the original material.

Thermosetting resin modified asphalt: A comprehensive review

The material composition, modification mechanism, and curing behavior of epoxy asphalt, thermosetting polyurethane modified asphalt, unsaturated polyester modified asphalt, and other...

Research on key factors influencing viscosity growth of thermosetting

As a typical thermosetting material, viscosity is critical in the compaction process of thermosetting polyurethane (PU)-modified asphalt (TPUA) pavement systems. However, limited research on the key factors governing TPUA viscosity has hindered the precise control of its allowable construction time.

Investigating on polymerization process and interaction mechanism of

Thermosetting polyurethane (PU) can significantly improve the high-temperature stability, mechanical strength, and low-temperature flexibility of asphalt. To broaden its application, a systematic understanding of how the PU interacts with the asphalt is needed.

Research Progress on Polyurethane-Modified Thermosetting Resins

Abstract: With the rapid development of materials science, polyurethane (PU) has emerged as a critical polymeric material due to its excellent mechanical properties, chemical resistance, and processability. traditional thermosetting resins suffer from inadequate mechanical strength, thermal stability, and long-term durability, limiting their applications in advanced fields. Incorporating PU into thermosetting resins not only enhances mechanical performance but also expands their application potential. This review summarizes recent advancements in PU-modified thermosetting resins, including modification methods, performance improvements, and future prospects.

Keywords: Polyurethane; Thermosetting resin; Modification; Performance enhancement; Application

1. Introduction Thermosetting resins, which cure through irreversible chemical reactions, are widely used in construction, automotive, and electronic industries due to their mechanical robustness and chemical stability. conventional thermosetting resins exhibit deficiencies in mechanical strength, heat resistance, and long-term stability, restricting their use in high-end applications. To address these limitations, researchers have explored integrating polyurethane (PU) into thermosetting resins to improve their overall properties.

2. Methods for Modifying Thermosetting Resins with PU

1. Physical Blending: PU is physically mixed with thermosetting resins to form composites. This approach is simple and cost-effective but may fail to fully resolve compatibility issues.
2. Chemical Grafting: PU is covalently bonded into thermosetting resin chains via grafting or block copolymerization, enhancing mechanical and thermal properties. Precision reaction control is required.
3. Nanocomposite Approach: Nanofillers (e.g., nano-CaCO₃, nano-SiO₂) are combined with PU and thermosetting resins to create nanocomposites. This improves mechanical and thermal performance but requires careful selection of fillers.

3. Performance Improvements in PU-Modified Thermosetting Resins

1. Enhanced Mechanical Properties: The composites exhibit higher tensile and compressive strength while retaining toughness and impact resistance.
2. Improved Thermal Stability: PU integration raises the glass transition temperature (Tg), enabling stability at elevated temperatures.
3. Chemical Resistance: Superior resistance to acids, alkalis, and salts improves corrosion resistance.
4. Optimized Processability: PU addition facilitates easy molding without post-processing thermal treatment.
5. Environmental Benefits: Reduced volatile organic compound (VOC) emissions make the materials eco-friendly.

4. Application Prospects of PU-Modified Thermosetting Resins

1. High-Performance Construction Materials: Suitable for bridges, high-rise buildings, etc., due to enhanced strength and heat resistance.
2. Automotive Components: Used in bumpers, engine parts, etc., to improve safety and lifespan.
3. Electronic Device Casings: Ideal for smartphones, tablets, etc., offering durability and safety.
4. Medical Devices: Applicable in implants and surgical instruments for improved performance and biocompatibility.

Research on PU-modified thermosetting resins provides innovative solutions to overcome the limitations of traditional thermosetting resins. By incorporating PU, both performance and application scope are significantly expanded. Future advancements are expected to unlock broader potential across diverse industries.