In-line evaluation of average particle size in styrene suspension polymerizations using near-infrared spectroscopy

✍ Scribed by A. F. Santos; E. L. Lima; J. C. Pinto

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 201 KB
• Volume: 70
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19981128)70:9<1737::aid-app11>3.0.co;2-2

✦ Synopsis

The main objective of this article is evaluating the influence of average polystyrene particle size upon the near-infrared (NIR) spectra collected during suspension polymerization experiments and observing whether NIR spectroscopy may be used for in-line monitoring and control of average particle size. It is shown that NIR spectra are sensitive to changes of the average particle size, and that standard empirical models (PLS-partial least squares-and NN-neural networks) may be built to correlate average particle size and light absorbance at certain wavelengths fairly well. Finally, it is shown that these models allow the in-line evaluation of average particle size in styrene suspension polymerizations with NIR spectroscopy.