Crossliking prevents the mobility of molecular chains, causing an interruptive melt-flow behavior that can change the nature of the polymer from a thermoplastic to thermoset (Tamboli et al., 2004). Due to its thermoset nature, the recycling of crosslinked polymerscannot be carried out by melting them, because crosslinked polymers do not melt. Fig. 1 shoes the injection mold of virgin HDPE and HDPE exposed to 200 h. accelerated weathering at the same processing conditions.