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Homopolymer poly( vinylidenefluoride) (PVDF) hasvarious crystal phases (mainly α,β,and γphases).Herewe describe the polymorph formation,α→γ phase transformation and preferential orientation of lamellar crystals in melt recrystallization of poly(vinylidene fluoride) (PVDF) hollow nanotubes fabricated from anodic alumina oxide (AAO) templates in different temperatures.