聚氨酯注浆加固材料蓄热性能的研究.pdfVIP

摘 要 聚氨酯注浆材料由于其诸多优点,在煤矿井下获得了广泛的应用。但是在实际 应用过程中，由于聚氨酯注浆材料存在蓄热温度高，容易产生冒烟、着火等安全隐 患，严重影响其使用和推广。本文主要研究聚氨酯基础工艺配方的调整及相变材料 的加入等对聚氨酯注浆材料的蓄热性能的影响。 基础配方研究表明：聚氨酯固结体内部最高蓄热温度随着异氰酸指数的增大 呈现先升高后降低的趋势，异氰酸指数为 1.07 时出现最大值为 144℃；随着预聚体 加入量的增加，最高蓄热温度呈降低趋势，当预聚体加入量为 10%时，最高蓄热温 度为 149℃。 相变添加剂研究表明：当 Na PO ·12H O 的烘干温度 50 ℃和添加量为 4% ，最高 3 4 2 蓄热温度降低幅度为 12℃，同时材料的阻燃性能提高。相变材料 PE(B)添加量为 8% 时，降低幅度为 16℃；当添加总量为 8% ，PE(B):滑石粉为 1:2 时，降低幅度为 18 ℃；当 10%的预聚体与 12%的滑石粉复合添加时，降低幅度为 16℃。 关键词：聚氨酯；化学注浆；蓄热性能；相变材料 - I - Abstract Polyurethane grouting materials as a result of its many advantages, has obtained the widespread application in the coal mine mine shaft. But in practice, because of regenerative high temperature of polyurethane grouting material, leads to security risks such as smoke, fire, seriously affecting its use and promotion. This thesis mainly studies the performance of polyurethane grouting material regenerative by the polyurethane foundation craft formula adjustment and addition of phase change material. The foundation formula research indicates that the highest heat temperature within the polyurethane solid-jieti with the increasing rise of isocyanate index has a first rise after falling trend. There is a maximum value of 144 ℃ when the isocyanate index is 1.07. With the increase of the amount of prepolymer, the maximum heat storage temperature is decreasing and when the prepolymer amount is 10%, the maximum heat storage temperature is 149 ℃. Study on phase transition of additive shows that when the drying temperature of Na PO · 12H O is 50 ℃ and the add amount of it is 4%, highest heat