Chemical reactions are accompanied by either luminescence or heat. Whether it is luminescence or fever, the common point is that the temperature will be generated. The dissolution of polyacrylamide also requires a certain temperature. So, what is the temperature to dissolve polyacrylamide? ? With this question, we will explain the dissolution temperature of polyacrylamide.
The conditions for the polymerization of polyacrylamide are the temperature. If there is no temperature, the polymerization reaction cannot exceed the start-up, that is, the initiator cannot initiate the polymerization normally, and it is obvious that the temperature is important for polyacrylamide.
Acrylamide is abbreviated as PAM, and its structural formula is [-CH2-CH(CONH2)]n-, and its molecular weight is 100 to 5 million. Polyacrylamide has two main forms, one is powdery, the other is colloid, and polypropylene
Amide emulsion (developed by Shanghai Synthetic Resin Research Institute). Soluble in cold water, very slow, high molecular weight polyacrylamide when the concentration exceeds 10%. A gel-like structure is formed. Increasing the temperature can slightly promote dissolution
Solution, but the temperature should not exceed 50 ° C to prevent molecular degradation. Hard to dissolve in organic solvents. Decomposes when the temperature exceeds 120 °C. neutral. Non-toxic.
If it is usually dissolved polyacrylamide, the polymer will accelerate degradation at above 60 °C. If the temperature is too high, the rate of decomposition of the initiator to generate free radicals will increase, which will affect the overall polymerization effect, and the suitable temperature is 55 °C.
It can be seen that 60 ° C is a big pass, and it is also 60 ° C, and the loss is also 60 ° C. In order to achieve good dissolution effect, polyacrylamide must take into account other factors such as temperature.
The molecular energy of polyacrylamide is adsorbed by suspended particles dispersed in a solution, and has a strong flocculation effect. Density = 1.3 Main use: This product has the water solubility of polymer compounds and the active acyl groups in its main chain, so it is used in petroleum exploitation, water treatment, textile printing and dyeing, paper making, mineral processing, coal washing, medicine, sugar production, culture, building materials, Agriculture and other industries have a wide range of applications, and are known as “a hundred additives” and “universal products”.
Polyacrylamide is used as a thickener, flocculant, and drag reducer, and has the functions of gelation, sedimentation, and reinforcement. Stored in a cool, ventilated, dry warehouse, protected from moisture, light, and heat. Storage time should not be too long.
