The present application relates to a copolymer comprising recurring units derived from vinylidene fluoride and recurring units derived from a fluorinated monomer M1; said copolymer having a melting temperature Tm defined by the relationship: (160.04 -2.5108 ∗ x) - 3 ∗ x) + 3 wherein x is the weight content of said fluorinated monomer M1 based on the total weight of said copolymer; the melting temperature being measured by DSC according to the ASTM E794-06 standard test method. The present application also relates to the use of said composition in various technical fields.