SBS自燃成因的探究

对于疑难火灾的原因分析与事故原因的深度调查，需要调查人员和技术鉴定人员找出能够证明火灾的直接证据和间接证据。利用视频分析、等温微量热实验、挥发分含量测定、气相色谱质谱分析实验等多种技术手段，通过对某仓库发生火灾的热塑性弹性体（SBS）进行多层次、多角度比对分析研究，给出了引发火灾的起火物，分析了起火物SBS发生放热的具体原因，给出了影响SBS稳定性的因素，并探究了其发生自燃的原因机理。分析研究结果表明，涉事的SBS不仅有低温放热现象，还能持续放热，物料本身又具有良好蓄热条件，完全具备了发生自燃的条件，综合分析该起火灾为SBS自燃所致。

Research on the causes of spontaneous combustion of SBS

For the cause analysis of difficult fires and the in-depth investigation of accident causes, investigators and technical appraisers need to find out the direct and indirect evidence that can prove the fire. In this paper, by means of video analysis, isothermal microcalorimetry experiment, volatile content determination, gas chromatography-mass spectrometry and other technical means, through multi-level and multi- angle comparative analysis and research on thermoplastic elastomer (SBS) in a warehouse fire, the fire causing substances are given, the specific causes of heat release of SBS are analyzed, and the factors affecting the stability of SBS are given, the cause and mechanism of spontaneous combustion were explored. The analysis and research results show that the SBS involved not only releases heat at low temperature, but also continuously releases heat. The material itself has good heat storage conditions and fully meets the conditions for spontaneous combustion. It is comprehensively analyzed that the fire is caused by spontaneous combustion of SBS.