hydroxypropyl methylcellulose HPMC in Plastering MortarFebruary 2nd 2023
HPMC manufacturer-What factors will affect the viscosity of hydroxypropyl methylcellulose
1. If the degree of polymerization of cellulose ether of hydroxypropyl methylcellulose is higher, its molecular weight will be larger, resulting in a higher viscosity of its aqueous solution.
2. If the dosage or concentration of cellulose ether is higher, the viscosity of its aqueous solution will be higher. However, care should be taken to select the appropriate dosage when using it, mainly to avoid excessive dosage. It will affect the working performance of mortar and concrete.
3. Hydroxypropyl methylcellulose cellulose ether is the same as most liquids, the viscosity of cellulose ether solution will decrease with the increase of temperature, and the higher the concentration of cellulose ether, the higher the temperature. The greater the impact.
4. Cellulose ether solutions are usually pseudoplastics with shear thinning properties. The greater the shear rate during the test, the smaller the viscosity.
To sum up, the cohesion of mortar will be reduced due to the action of external force, which is also conducive to the scraping and wiping of mortar, resulting in good cohesion and workability of mortar at the same time. However, cellulose ether If the solution has a low concentration and a low viscosity, it will show the characteristics of a Newtonian fluid. When the concentration increases, the solution will slowly show the characteristics of a pseudoplastic fluid, and if the concentration is higher, its pseudoplasticity will be more obvious.