1、Microphase separation regulation of polyurethane modified phenolic

Polyurethane modifier serves as phase separation regulator to control pore structure and skeleton phase structure. PF-PU aerogels exhibits remarkable mechanical properties enhancement by co-continuous phase structure. PF-PU showed excellent ablative thermal insulation performance.

2、Investigation of Polyurethane

The introduction of PU has profoundly altered the pyrolysis mechanism and gas-release behavior of PR, particularly in 250–600 °C. This study proposes novel insights and theoretical foundations for designing novel ablation-resistant PRs.

3、Polyurethane

Abstract Fullerenol polyurethane (C60-PU) and linear polyurethane (linear-PU) modified phenolic resins were prepared in this study. Phenolic resin/C60-PU and phenolic resin/linear-PU blends show go...

4、Microphase separation regulation of polyurethane modified phenolic

Applications of aerogels are commonly restricted by their complicated preparation route, high energy cost, brittleness and poor mechanical properties. Herein, a facile synthesis route for mechanical robust polyurethane (PU) modified phenolic resin (PF) aerogel was developed.

Research progress on modification of phenolic resin

In recent years, more and more researchers have focused on the discussion of the properties of modified phenolic resins and gradually ignored the research on the synthesis processes that can affect the molecular structure and properties of phenolic resins.

The coating based on phenolic resin gives rigid polyurethane foam

Based on the excellent adhesion of PF, the coating effectively suppresses heat transfer, and the synergistic effect of DOPO and nano-SiO 2 improves the flame retardancy of RPUF.

Investigation of Polyurethane

Phenolic resin (PR), renowned for its strong adhesive properties, superior heat resistance, and excellent chemical stability, finds extensive applications in industries, such as electronics,…

Investigation of Polyurethane

Request PDF | On Jan 1, 2025, Yanhang Li and others published Investigation of Polyurethane-Modified Phenolic Resins Pyrolysis Mechanism Via Experiments and Md Simulation | Find, read and...

Modification of phenolic resin and its effect on adhesive properties of

To solve the problem of poor bonding effect of polyurethane (PU)/metal at room temperature when Chemlok218 was used as adhesive, a highly active PU modifier was used to modify phenolic...

PU

PU-modified phenolic resin represents a promising material that combines the elasticity of polyurethane with the thermal stability of phenolic resin. This composite offers exceptional mechanical strength, heat resistance, and versatility, addressing diverse industrial needs.

Polyurethane-modified phenolic resin is a high-performance composite material with excellent mechanical properties, thermal resistance, and chemical corrosion resistance. It has broad application prospects in aerospace, automotive manufacturing, construction, and other fields. This article introduces polyurethane-modified phenolic resin from the following aspects:

1. Overview of Polyurethane-Modified Phenolic Resin

Polyurethane-modified phenolic resin is a high-performance composite material based on phenolic resin, modified by adding polyurethane components (such as polyether polyols, polyamides, etc.). This composite material exhibits superior mechanical properties, thermal stability, and chemical resistance, making it suitable for applications in harsh environments characterized by high temperatures, pressures, and corrosive conditions.

2. Preparation Process of Polyurethane-Modified Phenolic Resin

The preparation process primarily involves the following steps:

(1) Phenolic Resin Preparation: Phenolic resin is mixed with a catalyst and reacted at a specific temperature to obtain a phenolic resin solution.

(2) Polyurethane Preparation: Polyurethane is dissolved in a solvent at a certain temperature, followed by the addition of a catalyst to initiate polymerization, resulting in a polyurethane solution.

(3) Mixing and Curing: The phenolic resin solution and polyurethane solution are thoroughly mixed and then placed in a mold for curing to produce the final polyurethane-modified phenolic resin product.

3. Performance Characteristics of Polyurethane-Modified Phenolic Resin

(1) Excellent Mechanical Properties: The material demonstrates high tensile strength, compressive strength, and flexural strength, meeting the mechanical requirements of various structural components.

(2) Good Thermal Resistance: It maintains robust mechanical properties at elevated temperatures, suitable for high-temperature environments.

(3) Superior Corrosion Resistance: The material resists acids, alkalis, salts, and other corrosive substances, enabling long-term use in harsh conditions.

(4) Low Density: Its low density helps reduce the weight of structural parts and lower material costs.

4. Application Prospects of Polyurethane-Modified Phenolic Resin

(1) Aerospace: Its exceptional high-temperature performance makes it ideal for critical components such as aircraft engines and spacecraft parts.

(2) Automotive Manufacturing: Due to its high strength and low density, it can be used in automotive bodies, chassis, and other components.

(3) Construction: With excellent corrosion resistance and weatherability, it is suitable for decorative materials on building exteriors, roofs, and other areas.

As a high-performance composite material, polyurethane-modified phenolic resin offers outstanding mechanical properties, thermal resistance, and chemical corrosion resistance, making it valuable in aerospace, automotive, and construction industries. With technological advancements, its applications and development potential will expand further.