Contribution of reactive extrusion to technological and scientific challenges of eco-friendly circular economy

Nowadays, development and production in eco-friendly circular economy are themes of great importance. Concerning optimization of materials production, reactive extrusion (REX) is well established, using extruder as a chemical reactor. Biopolymers and recycling are two interesting fields in which REX can be used. In fact, through REX, biopolymers can be produced from monomers, modified (grafting…) or chemically blended with other polymers. Moreover, chemical reactions can occur between polymers and additives in order to optimize post-consumer polymer recycling. The first part of this chapter will focus on REX modellization, useful to optimize REX parameters, in agreement with eco-friendly circular economy domain. The second part of this chapter will focus on the production process of bio-derived polymers, their blends and composites, as well as recycling of post-consumer polymers.