Embodiments of the present disclosure are directed towards functionalized oligomers. As an example, a functionalized oligomer can be represented of Formula (I): (Formula I) in which R1 is a structure of Formula II: (Formula II) and R2 has a formula —CxHyO—, wherein n is an integer having a value from 2 to 6, m is an integer having a value from 2 to 10, X independently is an integer having a value from 1 to 12, and Y is an integer having a value from 2 to 24.