通过热解气体染色学/质谱法识别混合物和混合物的塑料
Chiara Gnoffo1, Alberto Frache1
1Department of Applied Science and Technology, Politecnico di Torino, V.le Teresa Michel, 5, 15121 Alessandria, Italy.
Polymers
|January 11, 2024
概括
热解气色谱/质谱 (py-GC/MS) 能够有效地检测和量化塑料混合物和挤出混合物中的聚合物. 这种方法克服了分析复杂聚合物复合物的传统技术的局限性.
科学领域:
- 聚合物科学 聚合物科学
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 在复杂的混合物和挤出混合物中识别聚合物对于FTIR,拉曼光谱和DSC等传统方法来说是一项挑战.
- 现有的技术可能会受到背景噪声和成分混合的干扰,这限制了它们在低度聚合物检测方面的有效性.
- 对于复合材料中的高分辨率,敏感的聚合物分析方法的需求对于材料表征和质量控制至关重要.
研究的目的:
- 研究热解气色谱法/质谱法 (py-GC/MS) 对于在固体混合物和挤出混合物中检测和量化各种聚合物的能力.
- 将py-GC/MS的疗效与复杂矩阵中的聚合物分析的传统分子谱法进行比较.
- 评估py-GC/MS对包括LDPE,PP,PS,PA和PC在内的常见塑料的定性和定量准确性.
主要方法:
- 对15种含有低密度聚乙烯 (LDPE),聚烯 (PP),聚烯 (PS),聚胺 (PA) 和聚碳酸 (PC) 组合的固体混合物的定性分析.
- 确定每个聚合物的特征性热解产品,以便在混合物中检测.
- 对高密度聚乙烯 (HDPE),PP和PS在不同重量百分比 (10-90%) 的挤出混合物中的定量分析.
主要成果:
- 在每一个分析的固体混合物中,Py-GC/MS成功检测到所有目标聚合物 (LDPE,PP,PS,PA,PC).
- 对挤出混合物中的聚合物的定量分析显示出线性趋势,确定系数超过0.9.
- 发现py-GC/MS的量化极限低于文献值,可能是由于挤出过程.
结论:
- Py-GC/MS是一种高效的技术,用于对简单混合物和复杂挤出混合物中的聚合物的定性和定量分析.
- 该方法通过最小化干扰和提供高灵敏度,与分子光谱技术相比提供更高的性能.
- 对于聚合物复合材料来说,Py-GC/MS提供了可靠和线性定量结果,这使得它对材料特性有价值.
关键词:
混合物 混合物 混合物校准曲线中的校准曲线.聚合物是一种聚合物.py-GC/MS/ py-GC/MS/ py-GC/MS/ py-GC/ py-GC/MS/ py-GC/ py-GC/ py-GC/ MS/ py-GC/ py-GC/ py-GC/ py-GC/ py-GC/ MS/ py-GC/ py-GC/ MS/ py-GC/ MS/ py-GC/ MS/ py-GC/ MS/ py-GC/ MS/ py-GC/ MS/ py-GC/ MS/ py-GC/ MS/ py-GC/ MS/ py-GC/ MS/ py-GC/ MS/ py-GC/ MS/ py-GC/ MS/ py-GC/ MS/ py-GC/ MS相关概念视频
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