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Polyacrylamide, also briefly referred as PAM, is commonly a polymer with acrylamide monomers bonded connected by end to end configuration; it is a hard glassy solid at room temperature. Because of the difference in production methods, the products can be white powder, translucent beads and flaky like. Its density is 1.302 g/cm3 (23 ??C) with glass transition temperature being 153 ??C and softening temperature being 210 ??C. It has good thermal stability and is soluble in water; its aqueous solution is clear and transparent with its viscosity increasing with increased molecular weight of the polymer, and also having a logarithmic relationship with the change in concentration of the polymer. Except for a few solvent such as acetic acid, acrylic acid, ethylene glycol, glycerol and formamide, it is generally insoluble in organic solvents.

Polycaprolactone (PCL for brief) is a semi-crystalline polymer, which is a chemically manufactured naturally degradable polymer product. Its architectural repeating system has 5 non-polar methylene-CH2 starch and other substances mixed. Completely naturally degradable products can be generated.

Poly??-caprolactone (PCL) is a low-melting polymer gotten by ring-opening polymerization of ??-caprolactone, and its melting point is just 62 ?? C. The most usual use of polycaprolactone is to generate unique polyurethane. Polycaprolactone endows the generated polyurethane with good water resistance, oil resistance, solvent resistance as well as chlorine resistance.