The main focus of this thesis is the synthesis of oxygenated block copolymers. These are attractive materials for a range of applications; however, they are typically associated with time- and labour-intensive synthetic procedures. For this reason, a more efficient one pot combination of two different polymerisation mechanisms, anhydride/epoxide ring-opening copolymerisation (ROCOP) and lactone ringopening polymerisation (ROP), with a single catalytic system was investigated. Thre...