矿用有机充填聚氨酯材料反应放热风险研究

Reactive Exothermic Risk of Filled Polyurethane Materials in Mines

为了评价矿用聚氨酯充填材料的反应放热风险,对不同组分的A.B料混合前后的红外光谱、热重差热、导热性能和放热性能进行了综合测试。测试结果表明:A、B原料及反应的生成物富含含氧官能团、热稳定性差、导热系数差,均为易燃物,在200℃之前就会发生热解;总体用量越多,反应达到的最高温度也越高;同时环境温度的升高加速A、B料的反应升温速率。在环境温度为25℃、用量为30mL时,该材料最高反应温度达140℃,具有较高的火灾风险,使用过程中应加以防控。

In order to evaluate the reaction exothermic risk of polyurethane（PU）filling materials in mines,a comprehensive test was performed on A and B material before and after mixing in terms of infrared spectrum,TG-DAT,thermal conductivity,and heat releasing performance.The test results show that：A,B raw materials,and their reaction products are rich in oxygencontaining functional groups with poor thermal stability and thermal conductivity,which are all inflammable（pyrolysis occurs under 200℃）.The more the overall amount is,the higher the reaction temperature is;meanwhile,the increase of the ambient temperature accelerates the heating rate of the reaction between A and B materials.When the ambient temperature is 25 ℃ and the dosage is 30 ml,the reaction temperature peaks to 140 ℃,which has a high fire risk and should be prevented and controlled.