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使用ATR-FTIR快速估计多3-基酸-co-3-基酸) 组成

Sara Alfano¹, Francesca Pagnanelli¹, Andrea Martinelli¹

¹Department of Chemistry, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy.

|October 28, 2023

概括

聚酸酸盐 (PHAs) 是一种可持续的,可降解的聚合物. 一种新的FTIR方法快速确定聚3-基酸-co-3-基酸 (P3HBV) 共聚合物的组成,为气体染色学提供了更快的替代方案.

科学领域:

聚合物科学聚合物科学
分析化学分析化学
生物技术是生物技术.

背景情况:

聚酸酸 (PHAs) 是一种有前途的可生物降解聚烯家族,有可能取代基于石油的塑料.
它们的微生物可持续生产和固有的生物降解性是其关键优势.
通过单体成分控制调节的热和机械性能对于各种应用至关重要.

研究的目的:

开发一种快速和简单的方法来确定聚3-基酸-co-3-基酸 (P3HBV) 的化学结构.
通过使用广泛可用的仪器来建立标准气相色谱方法的替代方案.
为了使P3HBV共聚物的精确组合分析能够用于材料特性.

主要方法:

使用减弱总反射里埃变换红外光谱法 (ATR-FTIR) 来确定组成.
开发了一种基于正常化吸收带强度与摩尔分数的线性依赖的校准方法.
从融到ATR元件上实施快速火,以减轻结晶度的变化并提高可重现性.

主要成果:

开发了一种校准方法,使用两个特定吸收带的正常化强度.
该方法准确地预测P3HBV样本中3-基酸重复单位 (X) 的摩尔分数.
逆回归的预测间隔被用来评估组成估计的不确定性.

结论:

拟议的ATR-FTIR方法提供了P3HBV共聚合物组成的快速和简单估计.
这种技术为PHA分析提供了传统气相色谱的可行替代方案.
该方法克服结晶性问题的能力提高了其在聚合物表征中的实用性.

关键词:

减弱的总反射 FTIR 的反射.组合的确定组合的确定反向线性回归的反向线性回归聚3-xybutyrate-co-3-xyvalerate) 是一种聚3-xybutyrate-co-3-xyvalerate) 的一种化合物.

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