Bottlebrush polymers are a class of highly branched macromolecules consisting of a main backbone chain with a high density of polymer side chains (see Figure ). The denselybranched architecture of bottlebrush polymers imparts molecular, and consequently material, properties that are distinct from typical linear polymers; the grafted side chains enhance the stiffness of the overall chain and force the backbone to adopt an extended conformation. In the case of bottlebrush melts, this leads to a suppression of molecular entanglements and significantly lowers the conformational degrees of freedom of these large polymers compared to linear polymer of similar length.