This data contains diffusion measurements of Shape Memory Polymers (SMP) immersed in demineralized water. The SMP is a polyurethane-based Polymer, which is produced from SMP Technologies Inc. The SMP filament were processed with a 3D printer (Ultimaker 3, Ultimaker, Geldermarsen, Netherlands).

The samples were dried in a drying oven for 10 days prior to the absorption measurements. The determination of the water absorption capacity is carried out at two different temperatures (30 °C and 60 °C). The samples are immersed in a demineralized water bath, which is stored in a drying oven. The time-dependent diffusive process is carried out with weight gain measurements. At each measuring point, the sample is taken out of the water bath and the surface water is wiped off with a lint-free cloth. Attention was paid to keep the measuring time (t < 30 sec) at each measuring point as short as possible in order not to influence the diffusive process. The measurement interval was set at the beginning of the measurement at 30 °C to 60 min and at 60 °C to 10 min. It was measured at daytime and working hours.

After the samples have been completely saturated, the desorption experiment starts. The saturated samples were stored in a drying oven at 30 °C and the weight loss was measured. The measurement parameters correspond to the absorption measurements at 30 °C.