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Continuous Kinetic Sampling of Flow Polymerizations via Inline UV-Vis Spectroscopy.
Macromolecular Rapid Communications ( IF 4.6 ) Pub Date : 2020-02-26 , DOI: 10.1002/marc.202000029
Felix Lauterbach 1 , Volker Abetz 1, 2
Affiliation  

Gapless monitoring of polymerization reactions is of paramount interest for academia and the polymer industry, allowing for efficient reaction screening and precise tailoring of the polymeric products. Herein, UV-visible spectroscopy (UV-vis) is employed as an operando measurement technique in continuous flow polymerization with ex situ calibration, to calculate monomer conversions with unprecedented resolution of only 10 s. A mathematical model based on volume contraction is provided for the first time, which yields monomer conversions from the absorption in the visible region for theoretically any homopolymerization. This model is validated for different monomers, solvents, and concentrations in a photoiniferter reversible addition-fragmentation chain transfer polymerization, proving the versatility of the presented setup. Notably, an ultralow measurement volume of merely a few hundred nanoliters is enough to ensure high accuracy.

中文翻译:

通过在线紫外-可见光谱对流动聚合进行连续动力学采样。

聚合反应的无间隙监测是学术界和聚合物行业的头等大事,它可以有效地筛选反应并精确定制聚合物。在本文中,UV-可见光谱法(UV-vis)被用作连续流动聚合中的异位校准的操作测量技术,以仅10秒的空前分辨率计算单体转化率。首次提供了基于体积收缩的数学模型,该模型可从可见光区域的吸收产生单体转化率,以进行理论上的任何均聚反应。该模型针对光引发剂可逆加成-断裂链转移聚合反应中的不同单体,溶剂和浓度进行了验证,证明了所提出设置的多功能性。值得注意的是
更新日期:2020-02-26
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