Polyacrylamide (IUPAC poly(2-propenamide) or poly(1-carbamoylethylene), abbreviated as PAM) is a polymer (-CH2CHCONH2-) formed from acrylamide subunits. It can be actinic as a simple linear-chain anatomy or cross-linked, about application N,N '-methylenebisacrylamide. In the cross-linked form, the achievability of the monomer getting present is bargain even further. It is awful water-absorbent, basic a bendable gel if hydrated, acclimated in such applications as polyacrylamide gel electrophoresis and in accomplishment bendable acquaintance lenses. In the straight-chain form, it is aswell acclimated as a thickener and suspending agent. More recently, it has been acclimated as a subdermal accompaniment for artful facial anaplasty (see Aquamid).