Fig. 3

Seed fragmentation. a schematic representation of the cross-section of a seed crystallite. The core, a central crystalline layer sandwiched by two amorphous layers, is surrounded by the corona chains that form superblobs of diameter D. Schematic representations of the fragmentation of seeds of core length, L, due to corona chain repulsion⁴⁰ in the case of b D < L < 2D, c L ≈ D, and d D/2 ≤ L < D. Length distribution histograms of the PFS₅₃-b-PI₆₃₇ seeds e before annealing, and f after annealing at 50 °C