Phosphonium-based ionic liquids: Economic and efficient catalysts for the solvent-free cycloaddition of CO2 to epoxidized soybean vegetable oil to obtain potential bio-based polymers precursors

1. Centeno-Pedrazo, A.
2. Perez-Arce, J.
3. Prieto-Fernandez, S.
4. Freixa, Z.
5. Garcia-Suarez, E.J.