Polymer Science and Engineering is an interdisciplinary field that investigates the synthesis, structure, and properties of polymers—large macromolecules that constitute materials like plastics, rubbers, fibers, and adhesives. It merges principles from chemistry and physics to understand the fundamental relationships between a polymer's molecular architecture and its macroscopic behavior, such as strength, elasticity, and thermal stability. As a sub-discipline of chemical engineering, it applies this scientific knowledge to design, process, and manufacture polymer-based materials into a vast range of useful products, focusing on reactor design for polymerization, process control for manufacturing, and the development of novel materials for advanced applications.