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2026
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What factors can affect the viscosity of hydroxypropyl methyl cellulose
workability. However, when the concentration of cellulose ether solution is low and its viscosity is small, it exhibits the characteristics of Newtonian fluid. As the concentration increases, the solution gradually exhibits the characteristics of pseudoplastic fluid, and the higher the concentration, the more pronounced the pseudoplastic behavior becomes.
What factors can affect the viscosity of hydroxypropyl methyl cellulose? It mainly depends on the following reasons.
1. The higher the polymerization degree of cellulose ether in hydroxypropyl methyl cellulose, the greater its molecular weight, resulting in a higher viscosity of its aqueous solution.
2. The higher the blending amount or concentration of cellulose ether, the higher the viscosity of its aqueous solution. However, when using it, it is important to choose an appropriate blending amount, mainly to avoid affecting the workability of mortar and concrete if the blending amount is too high.
3. Like most liquids, the viscosity of hydroxypropyl methyl cellulose ether solution decreases as the temperature increases. Furthermore, the higher the concentration of the cellulose ether, the greater the impact of temperature.
4. Cellulose ether solutions are typically pseudoplastic, exhibiting a shear-thinning characteristic. During testing, the higher the shear rate, the lower the viscosity.
In summary, the cohesiveness of mortar may decrease due to external forces, which is also beneficial for the scraping and troweling operations of mortar, resulting in mortar having both good cohesiveness and workability. However, when the concentration of cellulose ether solution is low and its viscosity is small, it exhibits the characteristics of Newtonian fluid. As the concentration increases, the solution gradually exhibits the characteristics of pseudoplastic fluid, and the higher the concentration, the more pronounced the pseudoplastic behavior becomes.
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