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Procedure for calibrating an ultrasonic sensor for online monitoring of conversion in latex reactors
Author(s) -
Siani André,
Storti Giuseppe,
Morbidelli Massimo
Publication year - 1999
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/(sici)1097-4628(19990613)72:11<1451::aid-app8>3.0.co;2-6
Subject(s) - vinyl acetate , methyl methacrylate , materials science , styrene , butyl acrylate , ultrasonic sensor , calibration , polymer chemistry , emulsion polymerization , thermodynamics , compressibility , acrylate , phase (matter) , emulsion , polymer , polymerization , chemical engineering , acoustics , composite material , chemistry , physics , organic chemistry , monomer , copolymer , engineering , quantum mechanics
In order to estimate online conversion and polymer composition through sound velocity measurements, a mathematical model for calculating sound velocity in emulsion polymerization has been developed. With respect to previous modeling approaches, its main features are as follows: (1) the application to three‐phase, reacting systems of Urick equation (usually adopted for estimating sound velocity in multiphase, dispersed, unreacting systems, such as emulsions and suspensions); and (2) the development of an empirical relationship for estimating particle compressibility as a function of conversion during the reaction. The model has been validated through several sets of experimental data of batch and semibatch homo‐ and copolymerizations involving styrene, butyl acrylate, vinyl acetate, and methyl methacrylate. In most of the examined cases, the performances of the calibration model are satisfactory. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 72: 1451–1477, 1999