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Identification Methods of Polyacrylamide Quality
Polyacrylamide (PAM) can be divided into anionic polyacrylamide HPAM, cationic polyacrylamide CPAM and nonionic polyacrylamide NPAM according to the different groups on the molecular chain. Different ionic polyacrylamides have different characteristics and have their own advantages in practical application.
The customers in the selection of polyacrylamide have such confusion, how can we choose high quality products. Here's how to identify the quality of PAM and share some experience with you:
1. Appearance. Solid polyacrylamide is generally white particles or powder, there are also slightly yellow products. Emulsion PAM is generally a colorless colloidal fluid.
2. The solid content of dry powder polyacrylamide should be generally between 88-90%.
3. Hydrolysis degree is also a standard to test the quality of polyacrylamide. The hydrolysis degree of anionic polyacrylamide is generally about 26%. It can also produce products with different hydrolysis degree according to the actual needs of customers. The hydrolysis degree of non-ionic polyacrylamide should not exceed 5%.
4. For anionic or non-ionic polyacrylamide, the larger the molecular weight, the better the quality. The error between the actual value and the labeling value of the product should be controlled at about 5%. The smaller the error, the more stable the product performance.
5. Polyacrylamide has a certain viscosity after dissolving in water. Viscosity can also test the quality of polyacrylamide. Generally speaking, the higher the viscosity of polyacrylamide, the better the quality. The viscosity of polyacrylamide can be measured accurately by Ukrainian viscosimetry. (It is recommended that you do not touch the skin directly with your hands, which is harmful to the skin.)