Oligomers are molecules composed of a small number of repeat units, conventionally fewer than about ten, joined by the same bonds that form a polymer, so they occupy the range between monomers and macromolecules ^[1]. Because the chain is short, properties that depend on entanglement or on long-range cooperative motion are absent, and the melting or softening behaviour is dominated by end groups and by the specific sequence of units ^[2]. Individual oligomers are discrete compounds with a defined molar mass, whereas a polymer is a distribution of chain lengths, and this distinction separates the two classes ^[3]. Oligomers retain the reactivity of their functional end groups, which allows them to be extended into higher polymers by further coupling ^[1].