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Shape-memory poly(p-dioxanone)–poly(e-caprolactone)/sepiolite(PPDO–PCL/OSEP) nanocomposites with different OSEP nanofiber loading were fabricated by chain-extending the PPDO-diol and PCL/OSEP precursors. The precursors and the composites were characterized by1 H NMR, FT-IR, GPC, SEM and TEM.The results demonstrate that a part of PCL segments grafted on the surface of OSEP and composites display a fine dispersion of OSEP fiber in nanoscale with low OSEP content. The shape memory effect(SME) was evaluated by DMA, the results reveal that the PPDO–PCL/OSEP nanocomposites exhibit desirable shape-memory performance. The reinforcement of composites by incorporation of trace OSEP nanofiber evokes an effective improvement in shape-memory recovery stress.
Shape-memory poly (p-dioxanone) -poly (e-caprolactone) / sepiolite (PPDO-PCL / OSEP) nanocomposites with different OSEP nanofiber loading formed by chain- extending the PPDO-diol and PCL / OSEP precursors. The precursors and the composites were characterized by1H NMR, FT-IR, GPC, SEM and TEM.The results demonstrate that a part of PCL segments grafted on the surface of OSEP and composites display a fine dispersion of OSEP fiber in nanoscale with low OSEP content. Shape memory effect (SME) was evaluated by DMA, the results reveal that the PPDO-PCL / OSEP nanocomposites exhibit desirable shape-memory performance. The reinforcement of composites by incorporation of trace OSEP nanofiber evokes an effective improvement in shape-memory recovery stress.