How the application amount of anionic polyacrylamide is in winter and summer

Anionic polyacrylamide, cationic polyacrylamide, nonionic polyacrylamide, usage required in winter and summer are different, why? Because the corresponding relationship between the polyacrylamide viscosity and lively and the surrounding temperature. Generally, in the winter it is to put a lot of polyacrylamide, while in summer, do not need to put in a lot of polyacrylamide. Because the winter when the lively of polyacrylamide is little, and the viscosity is small, so to reach the same purification effect, need to put more of polyacrylamide, and the summer is just the opposite.
The production process of polyacrylamide(PAC 30%):
Polyacrylamide is using acrylamide (acrylamide) as the monomer, benzoyl peroxide (BPO) induced by polymerization. The operating process is as follows: in the three neck bottle, acrylamide is dissolved in distilled water (10% concentration), start nitrogen pumped into the system, after 30 minutes, add a certain amount of BPO (BPO dosage as you want to get more high molecular weight polyacrylamide and poly acrylamide, BPO increases the more, molecular volume smaller), mounted on the reflux condenser, a stirring device, stirring, and at the same time the water bath heating to 50 ℃, reaction, should be continued through nitrogen reaction. With the reaction, the viscosity of the system increased. After 1 hours, the reaction stops. The reactants in the beaker, the beaker slowly adding anhydrous ethanol or acetone, stirring continuously, this is polyacrylamide began to precipitate, when there is no longer a white solid precipitation, the white solid gains in the infrared drying, grinding into powder to obtain the polyacrylamide.
The determination of the viscosity of polyacrylamide(anionic polyacrylamide) can be obtained by molecular weight (average molecular weight about 5000000); the use of BPO, application of acetone was recrystallized in a desiccator at bardo cold preservation after purification, otherwise the polymerization is hard to begin.

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