Quantitative Determination of PA6 and/or PA66 Content in Polyamide-Containing Wastes,ACS Sustainable Chemistry & Engineering

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Quantitative Determination of PA6 and/or PA66 Content in Polyamide-Containing Wastes
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-07-14 , DOI: 10.1021/acssuschemeng.0c04190
Ema Žagar ₁ , Urška Češarek ₁ , Ana Drinčić ₁ , Simona Sitar ₁ , Igor M. Shlyapnikov ₁ , David Pahovnik ₁

Affiliation

A fast, robust, and convenient method for quantitative determination of polyamide-6 (PA6) and polyamide-66 (PA66) in plastic wastes is presented. The method includes a straightforward procedure for complete hydrolysis of polyamides (PAs) into the constituent monomers and their quantitative determination in hydrolyzates by high-performance liquid chromatography on a mixed-mode column, from which the contents of a particular PA are determined. The method was developed on neat PA6 and PA66 as well as their mixture and was further utilized on PA-based composites and postconsumer wastes (carpet and fishing net wastes) containing PA in different amounts. The information on the content of a particular PA type in plastic wastes is important because it determines the maximum recovery of PA constituent monomer(s) by chemical recycling and consequently suitability of waste as a feedstock. Moreover, the proposed method allows for convenient differentiation between PA6 and PA66 in their mixtures, which is difficult to assess with precision by conventional characterization techniques.

中文翻译：

定量测定含聚酰胺废物中PA6和/或PA66的含量

提出了一种定量测定塑料废料中聚酰胺6（PA6）和聚酰胺66（PA66）的快速，耐用和便捷的方法。该方法包括将聚酰胺（PAs）完全水解成组成单体的简单程序，并通过在混合模式色谱柱上通过高效液相色谱对水解产物进行定量测定，从而确定特定PA的含量。该方法是在纯净的PA6和PA66及其混合物上开发的，并进一步用于含PA量不同的PA基复合材料和消费后废物（地毯和捕鱼网废物）。关于塑料废料中特定PA类型的含量的信息很重要，因为它决定了化学回收利用对PA组成单体的最大回收率，因此决定了废料是否适合用作原料。而且，所提出的方法允许方便地区分混合物中的PA6和PA66，这很难通过常规表征技术精确评估。

更新日期：2020-08-10

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