What is the function of plasticisers in polymers?

Plasticisers are additives that are incorporated into polymers to enhance their flexibility and workability. By reducing the intermolecular forces between the polymer chains, plasticisers allow them to slide past each other more easily, which leads to improved softness and increased flexibility of the material. This is particularly important in applications where a degree of pliability is required, such as in films, coatings, or flexible plastics.

While hardening a material, providing color, or increasing melting points are also important aspects of material properties, plasticisers specifically serve the purpose of creating a more flexible and adaptable polymer. This characteristic is crucial in many industries where flexibility directly impacts the performance and usability of the final product.