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Comparing near infrared and Raman spectroscopy for on-line monitoring of emulsion copolymerization reactions |
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| Authors: | Marlon M Reis Pedro HH Araújo Claudia Sayer Reinaldo Giudici |
| Institution: | 1. Departamento de Engenharia Química, Universidade de São Paulo, Escola Politécnica, Caixa Postal 61548 - CEP 05424-970, São Paulo, SP, Brazil, Fax: 55-11-3813-2380;2. Departamento de Engenharia Química, Universidade de São Paulo, Escola Politécnica, Caixa Postal 61548 - CEP 05424-970, São Paulo, SP, Brazil, Fax: 55-11-3813-2380
Departamento de Engenharia Química e Alimentos, Universidade Federal de Santa Catarina, Caixa Postal 476 - CEP 88040-970, Florianópolis, SC, Brazil |
| Abstract: | In this work, Raman and Near InfraRed (NIR) spectroscopies are evaluated for the monitoring of different semicontinuous emulsion homo- and co-polymerization reactions. Important process variables, namely monomer concentrations and average particle sizes, were monitored by both techniques under realistic conditions that would be found in an industrial environment (e.g. low signal/noise ratio, probe placed in the reaction medium). Results suggest that Raman and NIR are suitable for on-line monitoring of emulsion polymerization reactions and that the success of their application is mainly related to representative calibration models used for the estimation of the properties of interest. |
| Keywords: | average particle sizes emulsion polymerization monomer concentrations NIR spectroscopy on-line monitoring Raman spectroscopy |