According to the International Union of Pure and Applied Chemistry (IUPAC), an additive is defined as "A substance added to a polymer, usually a minor compound in the mixture formed that modifies the properties of the polymer" (International Union of . Except for certain additives such as plasticizers and fillers/reinforcements, the additives are chemical compounds added in relatively low concentrations into polymer matrices. Without the addition of the different additives, polymers would have virtually no properties for usage and application. For instance, plastics would exhibit very poor resistance over time. The market for additives is therefore very large. By 2022, it has been estimated at over $55 billion . Additives can be divided into different categories . This is a sector of innovation and then numerous literature reviews have already been published reporting some recent developments in this field .