Memory effect of the molecular topology of lamellar polyethylene on the strain-induced fibrillar structure

► The fibril long period in drawn polyethylene was shown to be independent of crystallization conditions. ► The microfibril diameter proved to be correlated with the initial morphogenesis. ► This structural feature is directly issued from the fragmentation of the crystal lamellae. ► We have demonstrated a memory effect of the chain topology on the fibril microstructure. ► The amorphous-crystal interphase is the key factor that governs the fragmentation process.