低温工程绝热材料PIR的老化研究及寿命预测

Study of aging and life prediction of polyisocyanurate foam thermal insulation material in cryogenic engineering

低温工程一般采用聚异氰脲酸酯(PIR)作为绝热材料。结合在低温服役环境的实际情况,通过人工加速老化的方法,对PIR绝热材料进行加热老化实验,对材料的拉伸强度与弯曲强度等随老化时间、老化温度等的变化情况及性能退化趋势进行研究分析,并应用阿累尼乌斯图对所选用型号的PIR绝热材料进行寿命预测。研究结果表明,该材料满足工程运行的寿命要求。

Cryogenic engineering usually uses the polyisocyanurate(PIR)foam as thermal insulation material.Combining with the actual situation of serving in low temperature environment,the heat aging tests of PIR were carried out by the artificial accelerated aging.The variation and performance degradation trend of the material\s tensile strength and bending strength with aging time and aging temperature were studied and analyzed.The life prediction of the selected type of thermal insulation material was made by using the Arrhenius diagram.The results shown that it can meet the life requirements of this project operation.