Contribution of Reactive Extrusion to Technological and Scientific Challenges of Eco-Friendly Circular Economy

Abstract

Nowadays, development and production in ecofriendly 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.Contribution of reactive extrusion to technological and scientific challenges to eco-friendly circular economy (Massardier, Quitadamo)rev-1(1).

Editorial: Alternative building blocks and new recycling routes for polymers: Challenges for circular economy and triggers for innovations

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Editorial on the Research Topic Alternative building blocks and new recycling routes for polymers: Challenges for circular economy and triggers for innovations Circularity often seems to be synonym of recycling and valorization of waste (Massardier-Nageotte, 2014;Massardier and Quitadamo, 2018), but identifying alternative building blocks routes for the eco-design of polymer materials (Delamarche et al, 2020a) made from biomass can be a relevant challenge. The present Research Topic gives a few answers relative to valorization of PLA (polylactic acid) based materials through (bio)degradation as well as to potential alternative routes to produce building blocks for materials, compatible with mechanical and chemical recycling, considering not only technological but also socio-economical points of view.Recent families of polymers, such as (bio)degradable PLA, able to be processed again in a perspective of mechanical recycling, could satisfy criteria of circularity from a technological point of view (Cosate de Andrade et al, 2016;Payne et al, 2019).

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