Characterization Of Blendes (pet/pehd) Basis Recycled Materials: Study Of The Effects Of Chains Extension And Compatibilization.

Poly(ethylene terephtalate) (PET) and polyethylene (PE) are widely used as packaging materials such as containers, bottles and films. Their annual rates of growth of production and consumption steadily increase. So, their recycling can reduce the resources needed for manufacturing, conserve energy and decrease the impact of their wastes on the environment. Triphenylphosphite (TPP) has been used as a chain extender to regenerate PET and high density polyethylene (HDPE) wastes and to improve the properties of PET/HDPE system based on recycled materials. Also, the blend has been compatibilized using the copolymer styrene/ethylene-butadiene/styrene (SEBS-g-MA). TPP incorporation in PET and HDPE showed a noticeable increase of the torque as a function of the mixing time and proved that degradation reactions rates are considerably decreased. In the case of PET/ HDPE blends, the increase of the torque was strongly dependent on the composition of the homopolymers. Furthermore, TPP and SEBS-g-MA incorporation contributed to significant variations of the structural and thermal properties of the regenerated PET and HDPE and their blends