Lactide-Valerolactone Copolymers for Packaging Applications
Ainara Sangroniz, Leire Sangroniz, Shaghayegh Hamzehlou, Nora Aranburu, Haritz Sardón, José-Ramon Sarasua, Marian Iriarte, José R. Leiza, Agustín Etxeberria
Abstract
Lactide-valerolactone copolymers have potential application in the packaging sector. Different copolymers were synthesized, and the kinetics of the copolymerization reactions and the microstructure of the copolymers were analysed. Lactide showed higher reactivity than valerolactone which leads to composition drift through the reaction. Thermal, mechanical and barrier properties of the selected copolymers were studied. Overall, the incorporation of valerolactone results in copolymers with higher ductility than poly(lactide) with intermediate water and oxygen permeability which makes these materials appropriate candidates for use in the packaging sector.