Polyacrylamide is an important synthetic polymer material, which is widely used in many fields such as water treatment, textile manufacturing, papermaking, and oil exploration. Its molecular weight is one of the important indicators for analyzing and evaluating the performance of polyacrylamide.
Polyacrylamide (abbreviated as PAM) is a linear polymer compound obtained by polymerization of acrylamide monomers. The molecular formula of monomeric acrylamide is C3H5NO, and the structure contains an amide group (-conH2), which has good water solubility and anatomical resistance.
The molecular weight of polyacrylamide is directly related to its physical, chemical and biological properties, which affects its application effect in different fields. Polyacrylamide with a higher molecular weight typically has the following characteristics:
High ionic performance: high molecular weight polyacrylamide can form complexes with ions in solution due to its many branch structures, and has good ion adsorption, solid-liquid separation and suspension effect.
Good oxalate adsorption performance: oxalate is a common organic pollutant, and polyacrylamide can complexe with oxalate to effectively remove organic pollutants in water.
Good precipitation performance: high molecular weight polyacrylamide can quickly coalesce with particulate matter to form large particles, which can improve the sedimentation rate of suspended solids in water.
Excellent filtrate performance: high molecular weight polyacrylamide can increase the viscosity of the filtrate and improve the filtrate effect of the filtrate by constructing a rigid polyelectrolyte network.
The molecular weight of polyacrylamide can be determined by a variety of experimental methods, among which the more commonly used methods are:
Polyacrylamide with different molecular weights has different applications in different fields:
Low-molecular-weight polyacrylamide is mainly used as a thickener, adhesive and biomedical carrier.
Medium molecular weight polyacrylamide is suitable for use in water treatment, textile treatment and the paper industry.
High molecular weight polyacrylamide is widely used in oil exploitation, mine tailings treatment and environmental protection.
The molecular weight of polyacrylamide is directly related to its performance and application effect. Accurate determination of the molecular weight of polyacrylamide is important for regulating its performance and optimizing applications. With the continuous progress of science and technology, the research and application of polyacrylamide molecular weight will continue to develop.