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In‐line and in situ monitoring of semi‐batch emulsion copolymerizations using near‐infrared spectroscopy
Author(s) -
Vieira Raphael A. M.,
Sayer Claudia,
Lima Enrique L.,
Pinto José Carlos
Publication year - 2002
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.10434
Subject(s) - methyl methacrylate , emulsion , in situ , butyl acrylate , acrylate , monomer , materials science , infrared spectroscopy , calibration , polymer , emulsion polymerization , polymer chemistry , chemical engineering , analytical chemistry (journal) , chemistry , composite material , chromatography , organic chemistry , physics , engineering , quantum mechanics
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. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 84: 2670–2682, 2002