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Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...
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通过近红外和拉曼光谱在现场监测聚烯链切割以进行基于溶解的回收利用.

Sofiane Ferchichi1,2,3, Nida Sheibat-Othman2, Olivier Boyron3

  • 1IFP Energies Nouvelles, Rond-Point de l'échangeur de Solaize, Solaize, 69360, France.

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概括

在回收过程中聚烯的降解可以使用光谱学来监测. 近红外 (NIR) 和拉曼光谱,结合化学测量,准确预测聚合物变化,有助于实时回收监督.

关键词:
在GA-PLS中使用.连锁切割 - 链切割 - 链切割监控 监控 监控 监控 监控 监控聚烯聚烯的使用方法回收回收是回收的过程.这是光谱学.

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科学领域:

  • 聚合物化学 聚合物化学
  • 材料科学 材料科学 材料科学
  • 频谱学是一种光谱学.

背景情况:

  • 通过溶解回收聚烯是一种有前途的可持续方法.
  • 了解和监测溶解过程中的聚合物降解对于工艺效率和产品质量至关重要.

研究的目的:

  • 在回收过程中研究聚烯在溶液中的降解.
  • 开发用于实时监测聚烯降解的光谱方法.

主要方法:

  • 在现场使用近红外 (NIR) 和拉曼光谱来分析聚烯降解.
  • 开发了NIR光谱的基因算法-部分最小方程 (GA-PLS) 模型和拉曼光谱的部分最小方程 (PLS) 模型.
  • 与聚合物降解参数相关的光谱变化,包括基线变化和色彩,与聚合物降解参数相关.

主要成果:

  • 用GA-PLS分析的NIR光谱显示了与基线变化相关的物理变化.
  • 用PLS分析的拉曼光谱显示,基线漂移与由于降解而产生的色彩相关.
  • 这两种光谱技术在监测降解方面都表现出良好的预测性能.

结论:

  • 现场NIR和拉曼光谱是监督溶液回收过程中聚烯降解的有效工具.
  • 这些光谱方法为聚烯回收操作中的实时过程控制提供了潜力.