不同涤纶绳索纤维的PY-GC/MS定性分析

利用裂解-气相色谱/质谱联用法对9个不同产地、不同规格的涤纶绳索样品进行鉴别分析.首先通过优化选择,确定试验条件,即裂解温度为550℃、裂解时间为6 s时,柱程序升温条件为50℃(1 min)20℃/min→250℃(10 min).在此条件下可最大限度的显示涤纶裂解产物的特征.9个样品的裂解分析结果显示,涤纶的主要裂解产物有13种,其中特征裂解产物为苯甲酸(相对强度100%)、苯甲酸乙烯酯、联苯、苯等.虽然9个涤纶绳索有相同的裂解特征,但个别裂解产物及各特征裂解产物的相对含量有所不同.这一差异可以作为不同规格、不同产地涤纶绳索分析鉴别的依据.

Analysis of Rope Fiber by PY-GC/MS

9 polyester rope samples of different origins and different specifications were identified by the pyrolysis gas chromatography-mass spectrometry(PY-GC/MS).Firstly,through optimization, the experimental conditions were determined: the pyrolysis temperature was 550 ℃and the pyrolysis time was 6 s, the column temperature was programed from 50 ℃(1 min) to 250 ℃(10 min) at a speed of 20 ℃/min.Under these conditions, the characteristics of polyester pyrolysis products can be displayed.Pyrolysis analysis results showed that there were 13 main cracking products of polyester fiber, and the characteristics of the product were benzoic acid (relative intensity100%), vinyl benzoate, biphenyl, benzene etc.Although the 9 polyester ropes had the same cracking characteristics, but the individual pyrolysis products and the relative contents of each characteristic product of were different.It can be used as the basis for the analysis and identification of polyester ropes in different specifications and different regions.