Shape memory polymer foam based on nanofibrillar composites of polylactide/polyamide

The deposited data contain results obtained from measurements: SEM, Rheometry, DMA, and compression tests.The attached data are provided in the form of text and Excel files typical of the respective software used.The attached data were obtained using the following tests:Uniaxial extension tests on samples were conducted using an extensional viscosity fixture (EVF) attached to the ARES rheometer. Rectangular specimens, measuring 18 × 10 × 0.7 mm³, were either prepared by hot compression molding at 200 °C in a standard mold (for blend) or cut from extruded tapes (for composite). These specimens were stretched uniaxially at 160 °C with constant Hencky strain rates of 0.05 and 0.5 s⁻1.Thermally activated shape memory characterization of foamed samples was conducted using a Q800 DMA instrument with the film tension clamp under controlled strain and controlled force modes. The dual shape memory properties were enforced by a primary strain of 20% applied at 60 °C. The strain was then held constant while the sample was cooled to room temperature and then released. To observe the memory effect, the samples were heated to 62 °C for 30 min to recover the shape.The mechanical properties of the foamed samples were tested under plane-strain compression using the Instron 5582 tensile testing machine. The test temperature was 25 °C. The specimen was compressed at a rate of 5% of the initial thickness per minute. The specimens had a rectangular shape with a size of 8 × 4 × 3 mm.The structure of the foams was analyzed by scanning electron microscopy (SEM) using a JEOL JSM 6010 LV/LA microscope. The internal structure of the samples was visualized by cutting at liquid nitrogen temperature.