ABSTRACT Chemical additives are essential for polymer compounds because they control processability, durability, fire resistance, and recyclability even at low concentrations. However, existing studies often classify additives by polymer type or commercial product family, which can overlook common molecular functions shared across resin systems. This study presents a function‐oriented framework for chemical additives used in the manufacture of polymer compounds. Stabilizers are discussed in terms of radical scavenging, hydroperoxide decomposition, excited state quenching, and photooxidative protection, focusing on antioxidant synergistic effects and the differences between UV absorbers and sterically hindered amine‐based light stabilizers. Flame retardants are evaluated by associating halogenated, phosphorus/nitrogen, mineral, and hybrid nanostructured systems with fire resistance performance indicators such as the limit of oxygen index, UL‐94 rating, maximum heat release rate, and smoke suppression. Chain extenders are compared based on functional group reactivity, polymer end group selectivity, molecular architecture, melt strength, and recyclability. Flow modifiers, including lubricants, hyperbranched polymers, low surface energy modifiers, and long‐chain branching agents, are analyzed through structure–rheology–processability relationships. Finally, we discuss regulatory and circularity economy constraints, including migration, additive consumption, toxicity, and closed‐loop recycling compatibility. This review demonstrates how function‐oriented additive design can enable more durable, processable, and sustainable polymer materials.
Kim et al. (Mon,) studied this question.