Improve polyether polyols in elastomers (such as TPU) in the wear resistance of the program analysis

As an important chemical raw material, polyether polyols are widely used in the field of elastomers, especially thermoplastic polyurethane elastomers (TPU). Its excellent physical properties and chemical stability make it widely used in shoe materials, automobile parts, sports equipment and other fields. There is still room for improvement in the wear resistance of polyether polyols in elastomers, which limits their application in high-performance materials. This paper will analyze in detail the scheme of improving the wear resistance of polyether polyols in elastomers from the aspects of molecular structure, processing technology and additives.

1. Polyether Polyol Molecular Structure on Wear Resistance

The molecular structure of polyether polyol is the basis of its wear resistance. In elastomers, polyether polyols typically act as soft segments, reacting with hard segments (e. g., MDI) to form polyurethanes. The structure of the soft segment directly affects the physical and mechanical properties of the material, including wear resistance. The following points are key to improving wear resistance:

1. The regularity of the molecular chain: the more regular the molecular chain of polyether polyol, the stronger the intermolecular force, the better the wear resistance of the material. The arrangement of the molecular chains can be optimized by adjusting the functional group density and molecular weight of the polyol.

2. Selection of terminal functional groups: The nature of the terminal functional groups directly affects the degree of crosslinking and intermolecular forces of the polyurethane. Selecting suitable terminal functional groups can increase the crosslinking density of the material, thereby improving the wear resistance.

3. Introduction of rigid groups: The introduction of rigid groups (such as epoxy groups or ketone groups) into the polyether polyol molecular chain can improve the rigidity and hardness of the material, thereby enhancing the wear resistance.

2. Processing Technology on Wear Resistance

Processing technology is an important part of determining the performance of polyether polyols in elastomers. Optimizing the processing technology can effectively improve the wear resistance of the material.

1. Optimization of mixing process: In the mixing process, by controlling the temperature, time and shear rate, the mixing uniformity of polyether polyol and hard segment can be improved. The uniform mixing can reduce the internal stratification of the material, thereby improving the wear resistance.

2. Regulation of crosslinking process: The crosslinking density of polyurethane can be optimized by regulating the type and amount of crosslinking agent. Appropriate crosslinking density can improve the strength and wear resistance of the material, but too high crosslinking density will cause the material to become brittle, but reduce the wear resistance.

3. Improvement of post-treatment process: Through post-treatment processes such as heat treatment and vulcanization, the performance of polyurethane can be further optimized. For example, the internal stress in the material can be eliminated by heat treatment, and the uniformity and wear resistance of the material can be improved.

3. Additives on Wear Resistance

The addition of additives is another effective means to improve the wear resistance of polyether polyols in elastomers. The wear resistance of the material can be further optimized by adding additives reasonably.

1. The addition of nano-fillers: The addition of nano-fillers (such as silica, carbon nanotubes, etc.) can significantly improve the wear resistance of polyurethane. The high strength and high surface activity of nanofillers can enhance the mechanical properties and wear resistance of materials.

2. The addition of anti-wear additives: By adding anti-wear additives (such as silicone resin, fluorine resin, etc.), the friction coefficient of the material can be reduced and the wear resistance of the material can be improved.

3. Addition of antioxidants and stabilizers: The addition of antioxidants and stabilizers can improve the oxidation resistance and thermal stability of the material, thereby extending the service life and wear resistance of the material.

4. summary and prospect

The wear resistance of polyether polyols in elastomers is an important performance indicator for their applications. The wear resistance of the material can be effectively improved by optimizing the molecular structure, improving the processing technology and adding additives reasonably. In the future, with the continuous progress of material science, polyether polyols will be more widely used in elastomers, and their wear resistance will be further improved, providing strong support for the development of high-performance elastomer materials.