聚氨酯泡沫热解产物对可燃液体物证鉴定的干扰性研究  

Study on identification interference of pyrolysisproducts of polyurethane foamon flammable liquids

作　　者：许洁 金静 王昊晨 Xu Jie;Jin Jing;Wang Haochen(China People's Police University,Hebei Langfang 065000,China;Ma'anshan Fire and Rescue Division,Anhui-Ma'anshan 243000,China)

机构地区：[1]中国人民警察大学,河北廊坊065000 [2]马鞍山市消防救援支队,安徽马鞍山243000

出　　处：《消防科学与技术》2022年第12期1753-1757,共5页Fire Science and Technology

基　　金：河北省自然科学基金资助项目(B2021507001);河北省教育厅项目(ZC2022091);中国人民警察大学中青年教师科研创新计划项目(ZQV2019018)

摘　　要：以不同密度聚氨酯泡沫为研究对象,采用同步热分析(STA)和气相色谱-质谱联用技术(GC-MS),分析了聚氨酯泡沫塑料热解产物对汽油鉴定干扰性的影响。试验表明,聚氨酯泡沫塑料热解过程可分为两个阶段,80 kg/m^(3)聚氨酯泡沫塑料第一阶段热解初始温度略低,质量损失率略大。聚氨酯泡沫塑料燃烧残留物中可检测到芳香烃、稠环芳烃和茚满类特征组分,但40kg/m3聚氨酯泡沫塑料燃烧残留物检出的相似特征组分数量明显较多,因此,40 kg/m^(3)聚氨酯泡沫塑料对汽油鉴定的干扰性高于80 mg/m^(3)。In this paper,the pyrolysis characteristics of polyure-thane foams with different densities and their influence on gaso-line identification were analyzed by simultaneous thermal analy-sis(STA)and gas chromatography-mass spectrometry(GC-MS).Experiments result indicated that there are two main weight loss processes during the thermal decomposition of polyurethane foams.In the first stage,the initial pyrolysis temperature of 80 kg/m^(3) polyurethane foam is slightly lower and the mass loss rate is slightly larger.The target characteristic components of aro-matic hydrocarbons,polycyclic aromatic hydrocarbons and In-dane gasoline can be detected in the combustion residue of poly-urethane foam,but the number of characteristic components de-tected in the combustion residue of 40 kg/m^(3) polyurethane foam is obviously higher,so the 40 kg/m^(3) The research results pro-vide some data support for the identification of flammable liq-uids.density polyurethane foam has stronger interference than 80 kg/m^(3) in gasoline identification.

关 键 词：气相色谱-质谱仪 同步热分析仪 聚氨酯泡沫塑料 汽油 热解 易燃液体鉴定 

分 类 号：TQ328.3[化学工程—合成树脂塑料工业] X932[环境科学与工程—安全科学]