Polyacrylamide (PAM) is widely used as a water treatment agent, cationic polyacrylamide (CPAM) and anionic polyacrylamide (HPAM). The main indicators of cationic polyacrylamide (CPAM) are ionization in addition to molecular weight, while the main indicators of anionic polyacrylamide (HPAM) are molecular weight and hydrolysis degree. When customers purchase anionic polyacrylamide (HPAM), they rarely take the initiative to mention the hydrolysis index, so what is the meaning of anionic polyacrylamide (HPAM) hydrolysis? What role does it play during use? What are the specific manifestations? The following is a detailed answer to you in Laixing Water Purification, Henan.
Hydrolysis degree is an index that characterizes the degree of hydrolysis, which reflects the hydrolysis performance of polyacrylamide (PAM) to a certain extent. Hydrolysis index refers to anionic polyacrylamide (HPAM) or nonionic polyacrylamide (NPAM), because cationic polyacrylamide (CPAM) does not have a hydrolysis index. The degree of hydrolysis of anionic polyacrylamide (HPAM) refers to the percentage of amide groups in the molecule that are converted to carboxyl groups during hydrolysis, and the carboxyl value is difficult to determine. Therefore, in practical applications, the ratio of sodium hydroxide to the weight of polyacrylamide (PAM) is usually measured by hydrolysis, which is usually called the hydrolysis ratio.
From a professional point of view, polyacrylamide (PAM) hydrolysis refers to the ability of weak ions in a polyacrylamide (PAM) solution to combine with water to form a weak base or weak acid, or polyacrylamide (PAM).The strength of the formation of weak acids and bases in aqueous solutions. For strong acids and alkalis, the higher the ionization, the stronger the wastewater, and the weaker the hydrolysis. Generally speaking, the higher the degree of ionization, the weaker the degree of hydrolysis. Correspondingly, the lower the degree of ionization, the greater the degree of hydrolysis. Generally speaking, when comparing the ion concentrations in the solution of acids or salts of acid ions, it is necessary to pay attention to their ionization and hydrolysis degrees.
In terms of sewage treatment, polyacrylamide (PAM) used for coal washing and sand washing is mostly a low hydrolysate product, and polyacrylamide (PAM) used for incense making, thickening and lubrication is a highly hydrolyzed product.