What is the purpose of stabilisers and antioxidants in polymers?

Stabilisers and antioxidants play a crucial role in enhancing the longevity and performance of polymers. Their primary purpose is to prevent degradation caused by environmental factors such as heat, ultraviolet (UV) light, and oxidation. Over time, exposure to these conditions can lead to changes in the physical and chemical properties of the polymer, which may result in loss of strength, discoloration, or brittleness.

Stabilisers help absorb UV radiation and mitigate thermal degradation, preventing the breakdown of the polymer chain. Antioxidants, on the other hand, protect the polymer from oxidative degradation by inhibiting the oxidation process that can be initiated by heat or light. Together, these additives significantly extend the service life and reliability of polymer products used in various applications, including packaging, automotive components, and construction materials.

In contrast, enhancing color, improving flexibility, and increasing flammability do not align with the main functions of stabilisers and antioxidants. Their contributions are specifically targeted towards maintaining the integrity and functionality of polymers under adverse conditions.