Humidity and thermal triggered Shape Memory Effect - Rheology-based numerical modelling - Diffusion measurements

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.

本数据集收录了浸泡于去离子水中的形状记忆聚合物（Shape Memory Polymers, SMP）的扩散行为测试数据。该形状记忆聚合物为聚氨酯基聚合物，由SMP Technologies Inc.公司生产。所用SMP丝材通过3D打印机（Ultimaker 3，Ultimaker，荷兰海尔德马森）制备成型。所有样品在吸水率测试前均置于干燥箱中干燥10天。吸水率的测定分别在30℃与60℃两种温度条件下开展。测试时将样品浸没于去离子水浴中，该水浴整体存放于干燥箱内。随时间变化的扩散过程通过称重法进行监测，记录样品的增重情况：每次测量时，将样品从水浴中取出，并用无尘布拭去表面附着的水分。为避免对扩散过程造成干扰，需尽可能缩短单次测量耗时，将每一点的测量时长控制在30秒以内。测量初始间隔设置为：30℃条件下为60分钟，60℃条件下为10分钟，且所有测量仅在日间工作时段进行。待样品完全吸水饱和后，开展解吸实验：将饱和样品置于30℃的干燥箱中，监测其重量损失情况，本次解吸实验的测量参数与30℃条件下的吸水率测试保持一致。