红外光谱技术检验汽车保险杠塑料  

Application of Infrared Spectroscopy in Plastics Automobile Bumper Examination

作　　者：宋小娇[1] Song Xiaojiao(Department of Criminal Science and Technology, Nanjing Forest Police College, Nanjing 210023,China)

机构地区：[1]南京森林警察学院刑事科学技术系,南京210023

出　　处：《工程塑料应用》2017年第9期105-110,共6页Engineering Plastics Application

基　　金：中央高校基本科研业务费专项资金项目(LGYB201610;LGYB201711);公安部技术研究计划项目(2015 JSYJC48)

摘　　要：为建立交通事故现场遗留的汽车保险杠塑料物证的快速检验方法及推断肇事逃逸车辆的信息,采集了53个不同厂家、不同车型的汽车保险杠塑料样品,用红外光谱法对样品中的主要成分进行定性和半定量分析。定性分析结果表明,所有样品的主要有机成分均为聚丙烯;但样品中添加的无机助剂的种类有差异,其中不添加助剂的样品4个、滑石粉为助剂的样品30个、滑石粉和碳酸钙的混合物为助剂的样品19个。半定量分析结果表明,对于以滑石粉为助剂样品,A_(670)/A_(1376)和A_(1016)/A_(2917)值的范围分别为0.528 0~1.468 1和1.535 0~3.933 4;对于以滑石粉和碳酸钙为助剂的样品,A_(670)/A_(1376),A_(1016)/A_(2917),A_(876)/A_(1376),A_(876)/A_(2917)值的范围分别为0.289 0~1.273 6,0.885 1~2.642 3,0.040 5~0.925 0,0.010 1~0.253 2,即测定特征峰面积的比值可以进一步区分汽车保险杠。因此,红外光谱技术分析汽车保险杠塑料主要成分的种类及相对含量,可以较好地区分不同厂家汽车的保险杠。In order to establish a method for detecting bumper plastic evidence in traffic accidents rapidly and obtaininformation of automobiles in hit-and-run incidents,53plastics automobile bumper samples of different typological automobileswhich made by different manufacturers were collected and determined by infrared spectroscopy.According to the result of thequalitative analysis,the main organic components of all samples are polypropylene.However,the inorganic additives are different.The number of samples in which without additive,talcum powder as additive,mixtures of talcum powder and calcium carbonate asadditives is4,30and19,respectively.From the semi-quantitative perspective,the ranges of values for A670/A1376and A1016/A2917are0.5280–1.4681and1.5350–3.9334respectively in the samples with talcum powder;the ranges of values for A670/A1376,A1016/A2917,A876/A1376and A876/A2917are0.2890–1.2736,0.8851–2.6423,0.0405–0.9250and0.0101–0.2532respectively in thesamples with talcum powder and calcium carbonate.Furthermore,automobile bumpers can be distinguished through mensurating theratios of characteristic peaks area.Consequently,bumpers made by different manufactures can be distinguished through analyzingthe main components and relative content of additives in samples by the infrared spectrum technology.

关 键 词：汽车保险杠 塑料 红外光谱 定性分析 半定量分析 

分 类 号：O657.33[理学—分析化学]