Polymer additives are substances added to polymers to enhance their properties and performance. These additives can improve characteristics such as flexibility, durability, and resistance to heat or chemicals. Common types of polymer additives include plasticizers, stabilizers, and fillers, each serving a specific purpose in the final product. These additives play a crucial role in various applications, from packaging materials to automotive components. By modifying the physical and chemical properties of polymers, additives help manufacturers create materials that meet specific requirements for different industries, ensuring better functionality and longevity of products.