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CasNo: 54182-57-9
Appearance: white powder
Structure |
Polyacrylic acid is a polyolefin.?It can be viewed as polyethylene with carboxylic acid (CO2H) substituents on alternating carbons.?Owing to these groups, alternating carbon atoms in the backbone are stereogenic (colloquially: chiral).?For this reason, acrylic acid exists in atactic, syndiotactic, and isotactic forms, although this aspect is rarely discussed.?The polymerization is initiated with radicals and is assumed to be stereorandom.?Crosslinking can be introduced in many ways. |
Application |
The dominant application for PAA is as a superabsorbent. About 25% of PAA is used for detergents and dispersants.Polyacrylic acid and its derivatives are used in disposable diapers. Acrylic acid is also the main component of Superadsorbent Polymers (SAPs), cross-linked polyacrylates that can absorb and retain more than 100 times of their own weight in liquid. Hydrogels derived from PAA have attracted much study for use as bandages and aids for wound healing. |
InChI:InChI=1/C3H4O2/c1-2-3(4)5/h2H,1H2,(H,4,5)