Large datasets of water vapor sorption, mass diffusion immersed in water, hygroscopic expansion and mechanical properties of flax fibre/shape memory epoxy hygromorph composites

This data article presents four experiment results related to flax fibre composites with epoxy shape memory polymer matrix: water vapor absorption, mass diffusion immersed in water, hygroscopic expansion, mechanical properties. The water vapor absorption tests are described by raw data related to four types of laminates with weights measured at different relative humidity (0%, 9%, 33%, 44%,75%, 85% and 100%). The mass diffusion experiments are related to weights of immersed samples over time. The unidirectional composite hygroscopic expansion is also measured along the fibre longitude and transverse directions. The, mechanical properties of flax composite at various temperatures (20°C, 40°C, 60°C, 80°C and 100°C) and humidity environments (50% and immersed) are also described. Load-displacement diagrams of the hygromorph composites are converted into stress-strain diagrams via a compliance calibration, from which the tensile moduli are extracted. The data presented in this article can provide a benchmark for the development of new models, or for the determination of other properties via post processing.本数据文章报道了四类以环氧形状记忆聚合物（epoxy shape memory polymer）为基体的亚麻纤维复合材料相关实验结果，涵盖水蒸气吸附、浸水质量扩散、吸湿性膨胀及力学性能四大方向。其中，水蒸气吸附测试的原始数据为四类层压板在不同相对湿度（0%、9%、33%、44%、75%、85%及100%）下的重量测定结果；质量扩散实验记录了浸水试样随时间演化的重量数据；单向复合材料的吸湿性膨胀分别沿纤维纵向与横向完成了测定。此外，本文还测定了亚麻复合材料在不同温度（20℃、40℃、60℃、80℃及100℃）与湿度环境（50%相对湿度及浸水状态）下的力学性能。通过柔度校准（compliance calibration），可将湿敏形状变形复合材料（hygromorph composites）的载荷-位移曲线转换为应力-应变曲线，并从中提取拉伸模量。本文所呈现的数据集可为新型模型开发，或通过后处理手段测定其他材料性能提供基准参照。