Lactide and glycolide(co)polymerization catalytic system

A catalytic system comprising

• (a) a trifluoromethanesulfonate of the formula
• in which
• R1 is selected from the group consisting of hydrogen, deuterium atom,
• -E14(R14)(R′14)(R″14);
• E14 is an element of group 14;
• R14, R′14 and R″14 are, independently selected from the group consisting of hydrogen, deuterium atom, substituted or non-substituted;
• alkyl, cycloalkyl and aryl, and in which said substituent or substituents are selected from the group consisting of halo, alkyl, cycloalkyl and aryl,
• as catalyst, and
• (b) a (co)polymerization additive of the formula
• R2-E-R3 (2)
• in which
• E is an element of group 16;
• R2 is hydrogen or deuterium atom;
• R3 is selected from the group consisting of hydrogen, deuterium atom, and
• -E′14 (T14)(T′14)(T″14);
• E′14 is an element of group 14;
• T14, T′14 and T″14 are, independently, hydrogen;
• deuterium atom;
• substituted or non-substituted members;
• alkyl, cycloalkyl and aryl, and in which said substituent or substituents are selected from the group consisting of:
• halo, hydroxy, alkyl, alkoxy, cycloalkyl, cycloalkoxy, aryl, aryloxy, carboxy, alkoxycarbonyl, cycloalkoxycarbonyl and aryloxycarbonyl for lactide and glycolide (co)polymerization.