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In the field of chemistry, polyacrylic acid is an important chemical substance. It has the characteristic of relatively high molecular weight. Relative molecular weight refers to the ratio of a substance's relative mass to a proton equal to 1/12 of the atomic mass of carbon-12. The molecular formula of polyacrylic acid is CH2CHCOOHn, where n represents the degree of polymerization and the number of repeating units of polyacrylic acid

The difference in relative molecular weight of polyacrylic acid is reflected in its comparison with other substances. The relative molecular weight of polyacrylic acid is relatively low, generally ranging from several thousand to several hundred thousand. This makes polyacrylic acid highly soluble and flowable in practical applications, facilitating its transportation and treatment as a chemical raw material

The difference in relative molecular weight of polyacrylic acid leads to different physical and chemical properties. Low molecular weight polyacrylic acid has good wettability and adhesion, and is suitable for fields such as coatings, adhesives, textiles, and inks. The polyacrylic acid with higher molecular weight has better water absorption and gel property, which is suitable for preparing hydrogels, drug release systems, etc. These differences make polyacrylic acid a very useful chemical substance

In addition, there are differences in the relative molecular weight between polyacrylic acid and other chemical substances. For example, polymer polypropylene, similar to polyacrylic acid, has a relatively high molecular weight. But unlike polyacrylic acid, polypropylene has better heat resistance and mechanical properties. In addition, polyacrylic acid also differs from materials such as polyamide, polyethylene, and polystyrene, which determine the application scope of polyacrylic acid in different fields

In summary, the difference in relative molecular weight of polyacrylic acid is mainly reflected in its comparison with other chemical substances. Its lower relative molecular weight gives it good solubility and fluidity, making it suitable for fields such as coatings and adhesives. The polyacrylic acid with higher molecular weight has water absorption and gel property, which is suitable for the fields of hydrogel, drug release system, etc. Compared with other polymers and chemicals, polyacrylic acid has its unique characteristics and application advantages.