Block polymers are macromolecules that consist of blocks of two or more polymer types linked together. These blocks can be arranged in various patterns and sizes, giving rise to a wide range of properties and applications. Synonyms for block polymers include block copolymers, diblock polymers, triblock polymers, multi-block polymers, segmented block copolymers, and graft copolymers. Block copolymers are the most common type of block polymer, consisting of two or more different polymer blocks linked together. Diblock polymers have two blocks, while triblock polymers have three. Multi-block polymers consist of four or more polymer blocks, and segmented block copolymers have alternating blocks of different polymers. Graft copolymers are formed when one polymer chain is attached as a branch onto another polymer chain.