中国塑料 ›› 2021, Vol. 35 ›› Issue (11): 120-124.DOI: 10.19491/j.issn.1001-9278.2021.11.018

• 标准与测试 • 上一篇    下一篇

热裂解气质联用鉴别PA56、PA66和PA6

胡慧廉(), 施嘉亮, 郎蕾, 施超欧, 姚建磊()   

  1. 华东理工大学化学与分子工程学院分析测试中心,上海 200237
  • 收稿日期:2021-05-10 出版日期:2021-11-26 发布日期:2021-11-23
  • 作者简介:胡慧廉(1963-),女,硕士,高级工程师,从事色谱方法开发和应用研究,huhl@ecust.edu.cn

Identification of PA56, PA66 and PA6 Through Pyrolysis Gas Chromatography⁃mass Spectrometry

HU Huilian(), SHI Jialiang, LANG Lei, SHI Chaoou, YAO Jianlei()   

  1. Analysis and Research Center,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China
  • Received:2021-05-10 Online:2021-11-26 Published:2021-11-23
  • Contact: YAO Jianlei E-mail:huhl@ecust.edu.cn;yjl@ecust.edu.cn

摘要:

采用热裂解气质联用(Py-GC/MS)方法鉴别聚酰胺56(PA56)、聚酰胺66(PA66)和聚酰胺6(PA6)及其共混物。结果表明,在550 ℃裂解温度下,PA56与PA66相对丰度100 %的峰为环戊酮,分别具有特征裂解产物1,8-二氮杂环十三烷-2,7?二酮和1,8-二氮杂环十四烷-2,7-二酮,PA6相对丰度100 %的峰为己内酰胺;此方法可用于快速鉴别PA56、PA66和PA6的工业初级品,并成功检出了PA6/PA56共混物、PA6/PA66改性共混物与改性PA66。

关键词: 热裂解?气相色谱/质谱, 聚酰胺56, 聚酰胺66, 聚酰胺6, 鉴别

Abstract:

Pyrolysis gas chromatography-mass spectrometry (Py-GC/MS) was conducted to identify polyamide 56, polyamide 66, polyamide 6 and their blends. The 100 % relative abundances of polyamide 56 and polyamide 66 were cyclopentanone at a pyrolysis temperature of 550 ℃, which were differentiated with the characteristic pyrolytic products of 1,8?diazabicyclotridecane-2,7-dione and 1,8?diazabicyclotetradecane-2, 7-dione. Meanwhile, polyamide 6 obtained 100 % relative strength of caprolactam. This made it possible to quickly identify industrial primary products of polyamide 56, polyamide 66 and polyamide 6. With this method, polyamide 6/56 blends, modified polyamide 6/66 blends and modified polyamide 66 can be detected successfully.

Key words: pyrolysis?gas chromatograph?mass spectrometry, polyamide 56, polyamide 66, polyamide 6, identification

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