8 Biobased functional additives for polymers

This chapter reviews the most prominent scientific approaches devoted to the development of biobased functional polymer additives, including their chemical composition and mechanism of action. Additionally, a resourceful list of already commercially available products is included. The additives are sorted out in two classes, according to their functionality: - Protective agents: antioxidants, light stabilizers, UV absorbers, flame retardants, heat stabilizers and acid scavengers; - Properties modifiers: impact modifiers, plasticisers, compatibilizers, coupling agents. These novel products are expected to increasingly enter the market, provided that they ensure the same performances of their oil-based counterparts, while representing a safer and more sustainable option. The chapter is intended as a resource for researchers and practitioners working on sustainable polymer formulations and their application.