Viscosity and fineness are important indicators that affect the performance of hydroxypropyl methylcellulose HPMC. Studies have shown that the water retention effect of HPMC increases with the increase of its viscosity, but after the viscosity exceed
Hydroxypropyl methylcellulose is a water-soluble polymer compound, also known as water-soluble resin or water-soluble polymer. It increases the consistency of the mixture by increasing the viscosity of the mixing water. It is a hydrophilic polymer ma
The excellent lubrication performance of molybdenum disulfide is determined by its crystal structure. Because the bonding force between sulfur atoms and molybdenum atoms in each molecular layer is powerful (covalent bond according to some literature), while the bonding force between sulfur atoms and molybdenum atoms between molecules is fragile (van der Waals force according to some literature), a plane with low shear force is generated. When the molecular layer is subjected to minimal shear for
There are many substances that can produce foam, but not all substances can produce foam can be used as the cement foaming agent. The foaming agent shall have sufficient stability to ensure that the foam will not break during mixing with the mortar and will not adversely affect the setting and hardening process of the cementitious material. At present, cement foaming agents mainly include resin soap foaming agent, aluminum powder foaming agent, vegetable protein foaming agent, petroleum aluminum
In the last article, the physical foaming agents of hydrocarbon foaming agents and hydrofluorane (HFC) foaming agents have been mentioned. In this article, the chemical foaming agents of OBSH and DPT will be talked about.
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