The relationship between the consistency of cement slurry and the content of hydroxypropyl methyl cellulose


There is also an excellent linear relationship between the consistency of cement slurry and the content of hydroxypropyl methylcellulose, and hydroxypropyl methylcellulose can significantly increase the viscosity of mortar. The more significant the range, the more pronounced the effect; the high density of hydroxypropyl methylcellulose aqueous solution has high thixotropy, which is also a substantial characteristic of hydroxypropyl methylcellulose. Aqueous solutions of MC polymers generally have pseudoplastic, non-thixotropic fluidity below their gel temperature but Newtonian flow properties at low shear rates. Pseudoplasticity is independent of substituent type and degree of substitution with increased molecular weight or concentration of hydroxypropyl methylcellulose. Therefore, as long as the concentration and temperature remain constant, hydroxypropyl methylcellulose with the same viscosity grade, no matter MC, HPMC, or HEMC, always shows the same rheological properties. When the temperature increases, structural gels are formed, and high thixotropic flow occurs. Hydroxypropyl methylcellulose with high concentration and low viscosity shows thixotropy even below gel temperature. This property dramatically benefits the construction of building mortar to adjust its flow and flow. It needs to be explained here that the higher the viscosity of hydroxypropyl methylcellulose, the better the water retention. The higher the density, the higher the relative molecular weight of hydroxypropyl methylcellulose and the corresponding reduction in its solubility harms the mortar concentration and construction performance. The higher the viscosity, the more pronounced the thickening effect of mortar, but it is not entirely proportional to the relationship. Some low and medium-density but modified hydroxypropyl methyl cellulose in improving the structural strength of wet mortar have more performance; with the increase of viscosity, hydroxypropyl methylcellulose water retention improved. If you are looking for high quality, high purity and cost-effective Hydroxypropyl methylcellulose, or if you require the latest price of Hydroxypropyl methylcellulose, please feel free to email contact mis-asia.

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