Sinofloc Chemical

What is the Difference Between Polyacrylamide Viscosity and Molecular Weight?

Enterprises who have used PAM polyacrylamide know that this product is a flocculant with unique effects, which is mainly used for the purification of industrial sewage. The flocculation is derived from the factor in the molecular weight of polyacrylamide, and the factor in the molecular chain is polymerized through the hydrolysis process to generate adsorption and bridging between ions to absorb suspended ions and floating objects in the water to treat sewage, so the molecular weight of polyacrylamide is important in the water treatment process.

1. The difference between polyacrylamide viscosity and molecular weight

The importance of the molecular weight of PAM polyacrylamide is mainly reflected in the flocculation. The molecular weight of the product is a key factor in determining the flocculation effect. Due to the different characteristics of industrial sewage, just like a company with more serious pollution, if a product with a lower molecular weight is used, it will be the problem of sewage discharge caused by poor flocculation effect, so the molecular weight of anionic pam polyacrylamide plays an important role in the sewage treatment process.

Let's talk about "the importance of polyacrylamide viscosity". Generally speaking, viscosity refers to the viscosity at a certain concentration and temperature. Since there are many classification specifications of PAM, the selection for different industries is different. If PAM polyacrylamide is used in the sewage treatment industry, the use effect of PAM is affected by viscosity. Polyacrylamide is a high molecular weight polymer, and the PAM solution with a concentration of a few percent is already very viscous. If the concentration exceeds 10%, it will be difficult to handle, but gradually increase the temperature, the viscosity will naturally decrease, and its influencing factors.

The performance of polyacrylamide flocculant is directly related to its solution viscosity. In general, the higher the viscosity, the better the performance, that is to say, the higher the molecular weight of the PAM polyacrylamide product, the better the performance; if its viscosity is affected by certain The flocculation performance will inevitably decline due to the influence of factors. However, there are also many polymer flocculants on the market with high viscosity but poor flocculation effect, which is related to many factors.

2. Methods to enhance the effect of polyacrylamide

In the process of using polyacrylamide, some customers will reflect that the effect of use is not very ideal. In fact, this has a very direct relationship with the method of use, which is related to the method of use. Here we remind all users again, when using PAM polyacrylamide, be sure to pay attention to the method of use.

(1) The first method to increase the effect: it is directly related to the water temperature. After testing, the following data are obtained: the water temperature is 20-30 ℃. The hydrolysis rate doubled every time the temperature increased by 10°C. In particular, temperature has a great influence on the flocculation effect of aluminum salts. When the water temperature is lower than 5 °C, the hydrolysis rate of aluminum salts is extremely slow, and the effect is significantly reduced. It can be seen that we must pay attention to the problem of water temperature.

(2) The second method to increase the effect: appropriately add a coagulant. Sometimes when the flocculant alone cannot achieve good results, a certain auxiliary agent called a coagulant can be added to adjust and improve the flocculation conditions and improve the treatment effect. Therefore, at a specific time, it is necessary to consider the appropriate addition of coagulation aids and the use of polyacrylamide.

(3) The third method to increase the effect: the stirring time of polyacrylamide should be increased.

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