Block copolymers are a type of polymer made from two or more distinct polymer segments, known as blocks. These blocks can have different chemical properties, allowing the material to exhibit unique characteristics. By controlling the arrangement and length of these blocks, scientists can tailor the properties of the copolymer for specific applications. These materials are often used in various fields, including materials science, biomedical applications, and nanotechnology. Their ability to self-assemble into organized structures at the nanoscale makes them valuable for creating new materials, such as drug delivery systems and lightweight composites.