本文介绍了超低温下硬质聚氨酯泡沫塑料机械性能测试方法,给出了该材料拉伸和压缩性能的大量数据,证明了超低温下用引伸计测变形的可行性,着重阐述了在超低温下采用多试样装置进行试验,既可提高试验效率,又能大大减少低温介质的损耗,是一种切实可行的具有明显经济效益的方法。 This paper introduces the testing method of the mechanical properties of rigid polyurethane foam at ultra-low temperature, gives a large amount of data about the tensile and compressive properties of the material, proves the feasibility of deformation measurement by extensometer at ultra-low temperature, The test of the sample device can not only improve the test efficiency but also greatly reduce the loss of the low-temperature medium, which is a feasible method with obvious economic benefits.