What is Polyethylene Density?
Polyethylene density is a characteristic used to distinguish between grades of polyethylene plastics that is expressed as g/cm3. This measurement varies among petroleum-derived plastics due to differences in crystallization structure formed during the polymerization of ethene. In addition, density is affected by molecular weight of the final product. Branching, or the bonding of ethene monomers to hydrogen molecules to form polymers, also determines density. In fact, this last factor is the primary difference between high-density polyethylene (HDPE) and low-density polyethylene (LDPE).
