Comparison of techniques for the determination of conversion during suspension polymerization reactions

Brazilian Journal of Chemical Engineering

卷:25

关键词: Suspension polymerization;    Bulk polymerization;    Gravimetry;    Styrene;    Raman spectroscopy;   

DOI  :  10.1590/S0104-66322008000200017

来源: DOAJ

【 摘 要 】

The determination of conversion during suspension polymerization reactions is not an easy task due to the heterogeneity of the reaction medium and the tendency of particles to agglomerate rapidly when stirring is stopped. Usually, bulk polymerization in ampoules is employed to study the kinetics of suspension polymerization reactions. In this work, a comparison of different techniques for the determination of conversion during suspension polymerization reactions is presented. Results showed a good agreement between the conversion obtained by gravimetry during styrene suspension polymerization and on-line conversion monitoring data using fiber-optic based Raman Spectroscopy. Nevertheless, the polymerization rate of styrene bulk polymerization carried out in ampoules was higher than the real reaction rate of styrene suspension polymerization due to slightly higher reaction temperatures. Simulation results using the experimental temperature data in a mathematical model confirmed these results.

【 授权许可】

Unknown