In this research article, we conducted a comprehensive investigation into the synthesis of poly(butylene adipate)-co-(dilinoleic adipate) (PBA-DLA) copolymers using two distinct methods: bulk polycondensation and polycondensation in diphenyl ether. Our study aimed to evaluate the environmental impact, chemical structure, composition, and key properties of the resulting copolymers, ultimately determining the viability of bulk synthesis as a more sustainable and environmentally friendly approach.