On-Line Estimation of Conversion and the Molecular Weight Distribution in Batch Methyl Methacrylate Solution Polymerization

Ellis, Mark F.; Taylor, T. H.; Jensen, Klavs F.

doi:10.23919/acc.1988.4789806

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…Given the kinetic scheme presented in Table 1, the species balances incorporating the chain-length dependence of the termination rate constant (assuming no concentration or temperature gradients in the reacting medium) are as follows: (Ellis et al, 1987). but was neglected in the work presented here since termination by disproprtionation is the predominant mode of termination in MMA polymerization (Odian,198 1) and including it caused poorer agreement between predicted and experimental weight-and number-average molecular weight data.…”

Section: Kinetic Model Developmentmentioning

confidence: 99%

Estimation of the molecular weight distribution in batch polymerization

et al. 1988

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A filtering technique is proposed for on-line estimation of the temperature, monomer conversion, initiator conversion, and the entire molecular weight distribution in a batch methyl methacrylate polymerization reactor. The technique uses a detailed polymerization model combined with on-line measurements of conversion, temperature, and the molecular weight distribution, taken at different discrete time intervals. The polymerization model includes a chain-length-dependent termination rate constant which allows the prediction of the molecular weight distribution for common free-radical polymerization conditions. Comparisons between modeling and experimental results show that the polymerization model gives good predictions of the monomer conversion and the molecular weight distribution in the polymerization system. The performance of the estimation scheme is tested for cases of strong gel effect conditions leading to a bimodal molecular weight distribution, and poor initial conditions. Finally, off-line experimental data are used to test the algorithm under actual reactor operating conditions.

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Section: Kinetic Model Developmentmentioning

confidence: 99%

Estimation of the molecular weight distribution in batch polymerization

et al. 1988

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“…Several specific control strategies have been proposed for various types of polymerization reactors (see MacGregor et al 1984 for a review; see also, for example, Houston and Schork 1987, Adebekun and Schork 1989a, b, Congalidis et al 1989, Ellis 1990, McAuley and MacGregor 1992. With the exception of the few implemented on experimental laboratory-scale reactors, however, the vast majority of these strategies were evaluated via computer simulation.…”

Section: Introductionmentioning

confidence: 98%