Plasticizers are high-boiling, low-volatility organic liquids or solids added to synthetic polymers—primarily Polyvinyl Chloride (PVC)—to lower their glass transition temperature (Tg), melt viscosity, and elastic modulus. By embedding between polymer chains, plasticizers reduce intermolecular forces, significantly improving flexibility, elongation, and processability. Modern plasticizer technology emphasizes Non-Phthalate Eco-Friendly Plasticizers alongside specialized performance esters for wire & cable, medical, food packaging, and automotive applications.