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首页> 外文期刊>Plastics, Rubber and Composites >Toluenediamine in Polyurethane Foams Hazard or Artefact?
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Toluenediamine in Polyurethane Foams Hazard or Artefact?

机译：聚氨酯泡沫中的甲苯二胺是否有危害或伪影？

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摘要

The aim of this study was to investigate the formation of the suspected carcinogen toluenediamine (TDA) as a degradation product of polyurethane. For this purpose, a series of model systems was prepared, including linear polyurethanes and foams. The starting materials were fully characterised using melting point and refractive index determination, end group analysis, infrared spectroscopy, nuclear magnetic resonance spectroscopy and coupled gas chromatography-mass spectrometry (GC-MS). A model commerciall polyurethane foam was also prepared. Three different solvent extraction protocols were applied and the extracts analysed by coupled GC-MS and high performance liquid chromatography-mass spectrometry. No detectable amounts of TDA could be found in extracts of both linear polyurethane and foam incubated using either toluene or 1% acetic acid solution. By contrast, TDA was found in extracts from both linear polyurethane and foam that had been exposed to alkaline conditions during the extraction procedure. These findings confirm that the formation of TDA in extraction and GC-MS analysis of polyurethane sampels results from hydrolytic degradation processes of polyurethane and that alkaline conditions should be avoided during extraction and analysis.
机译：这项研究的目的是调查可疑致癌物甲苯二胺（TDA）作为聚氨酯的降解产物的形成。为此，准备了一系列模型系统，包括线性聚氨酯和泡沫。使用熔点和折射率测定，端基分析，红外光谱，核磁共振光谱和气相色谱-质谱（GC-MS）对原料进行了充分表征。还制备了模型化的商业聚氨酯泡沫。应用了三种不同的溶剂萃取方案，并通过GC-MS和高效液相色谱-质谱联用分析了萃取物。使用甲苯或1％乙酸溶液孵育的线性聚氨酯和泡沫提取物中均未发现可检测量的TDA。相比之下，在萃取过程中暴露于碱性条件下的线性聚氨酯和泡沫萃取物中均发现了TDA。这些发现证实，在聚氨酯样品的萃取和GC-MS分析中，TDA的形成是由聚氨酯的水解降解过程引起的，并且在萃取和分析过程中应避免碱性条件。

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