2. HDPE geomembranes

2.1 Composition

• Polymerization

  Polyethylene is a thermoplastic polymer obtained by polymerizing ethylene monomer. The ethylene monomer molecule has the formula C ₂ H ₄ with a double bond between the two carbon atoms (figure 1 a). It is thanks to this double bond that polymerization can take place, as can be seen in figure 1 b. It's important to note that figure