Polyacrylamide, also known as PAM, is a glassy solid. It is easy to absorb water, and the speed of absorption varies with the characteristics of derivative ions. Polyacrylamide is soluble in water, acetic acid, glycol, glycerin, amine and other organic solvents. Decomposition temperature is above 200 ℃ after long-term heating. The black powder was carbonized at 210 ℃ without oxygen.