Feasibility of the Simultaneous Determination of Monomer Concentrations and Particle Size in Emulsion Polymerization Using in Situ Raman Spectroscopy

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• 作者：Claudia Houben ; Gabit Nurumbetov ; David Haddleton ; Alexei A. Lapkin
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2015
• 出版时间：December 30, 2015
• 年：2015
• 卷：54
• 期：51
• 页码：12867-12876
• 全文大小：621K
• ISSN：1520-5045

文摘

An immersion Raman probe was used in emulsion copolymerization reactions to measure monomer concentrations and particle sizes. Quantitative determination of monomer concentrations is feasible in two-monomer copolymerizations, but only the overall conversion could be measured by Raman spectroscopy in a four-monomer copolymerization. The feasibility of measuring monomer conversion and particle size was established using partial least-squares (PLS) calibration models. A simplified theoretical framework for the measurement of particle sizes based on photon scattering is presented, based on the elastic-sphere-vibration and surface-tension models.