Fig. 3

Structural characteristics of block copolymers. a SAXS profiles of the block copolymers prove the confinement of the crystallization inside the nanodomains formed in the melt state. TEM images of b P2VP-b-P(VDF₇₀-TrFE₃₀)-b-P2VP, c P2VP-b-P(VDF₅₀-TrFE₅₀)-b-P2VP and d PS-b-P(VDF₇₀-TrFE₃₀)-b-PS after crystallization from the melt demonstrate different segregation strength between blocks. No staining of the block copolymers is required as sufficient density contrast exists between crystalline P(VDF-TrFE) and amorphous blocks. Annealing of e the solvent casted PS-b-P(VDF₇₀-TrFE₃₀)-b-PS with asymmetric lamellar morphology at 120 °C results in f the increase of the crystalline layer thickness without changing the overall lamellar period (See Supplementary Fig. 4). g DSC cooling curve of the pristine P(VDF-TrFE) and corresponding block copolymers, obtained at a cooling rate 10 °C min⁻¹