In‐line and in situ monitoring of semi‐batch emulsion copolymerizations using near‐infrared spectroscopy
In‐line and in situ monitoring of semi‐batch emulsion copolymerizations using near‐infrared spectroscopy
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DOI：
10.1002/app.10434
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发表时间：
2002-06
影响因子：
3
通讯作者：
R. A. M. Vieira;C. Sayer;E. Lima;J. Pinto
中科院分区：
文献类型：
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作者：
R. A. M. Vieira;C. Sayer;E. Lima;J. Pinto
本文表明，近红外光谱(NIRS)可以有效地在线和现场同时监测种子半间歇乳液聚合过程中反应介质中单体(甲基丙烯酸甲酯和丙烯酸丁酯)和聚合物的浓度。计划进行一系列实际反应实验，以适当获取和选择校准样品。利用偏最小二乘法在1100-1900 nm范围内建立了三个独立的校正方程，并成功地在线监测了一些干扰反应。
This article shows that near-infrared spectroscopy (NIRS) can be used efficiently for the simultaneous in-line and in situ monitoring of monomer (methyl methacrylate, MMA, and butyl acrylate, BuA) and polymer concentrations in the reaction medium during seeded semibatch emulsion copolymerizations. A series of actual reaction experiments was planned to allow the proper obtainment and selection of calibrating samples. Partial least squares (PLS) was used to build three independent calibration equations in the range of 1100-1900 nm, which were used to successfully monitor some disturbed reactions in-line.