The main difference between different molecular weights of polyether polyols lies in their physical and chemical properties, as well as their performance in different applications.
1.. The influence of molecular weight on the properties of polyether polyols
Low molecular weight polyether polyols: usually have higher reactivity and lower viscosity, suitable for occasions requiring fast response and good fluidity. For example, low molecular weight polyether polyols are often used to prepare elastomers, sealants and coatings, etc.
High molecular weight polyether polyols: have higher viscosity and better flexibility, and are often used to prepare highly elastic coatings and elastomers. High molecular weight polyether polyols are suitable for applications requiring high elasticity and flexibility, such as highly elastic coatings and elastomers.
2. Application fields of polyether polyols with different molecular weights
Low molecular weight polyether polyols: due to their low viscosity and high reactivity, they are often used to prepare elastomers, sealants and coatings, etc.
High molecular weight polyether polyols: due to their high viscosity and good flexibility, they are suitable for the preparation of highly elastic coatings and elastomers, as well as in applications requiring high elasticity and flexibility.
3. Specific effects of molecular weight on the performance of polyether polyols
Reactivity: Low molecular weight polyether polyols have higher reactivity due to their shorter molecular chains and are suitable for applications with fast reactions.
Viscosity: High molecular weight polyether polyols have higher viscosity and are suitable for applications that require higher viscosity.
Physical state: High molecular weight polyether polyols are usually more viscous, while low molecular weight polyether polyols are more fluid.