A model for the coagulation of polyvinyl acetate particles in emulsion

Melis, S.; Kemmere, M.F.; Meuldijk, J.; Storti, Giuseppe; Morbidelli, Massimo

doi:10.1016/s0009-2509(99)00594-1

Cited by 41 publications

(37 citation statements)

References 17 publications

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“…A number of models based on the (classical and extended) DLVO theory [83,84] have been proposed to predict the coagulation rate coefficients of latex particles stabilized both by anionic surfactants (Coen et al [8,22], Fortuny et al [85], Kiparissides et al [86], and Melis et al [87,88]), or of non-ionic surfactants (Immanuel et al [13], Kammona et al [48], and Lazaridis [89]). Next, we will take a look at the key steps of the DLVO approach, followed by a discussion of its major limitations.…”

Section: Dlvo-based Modelsmentioning

confidence: 99%

“…This equation was used in references [13,48,85,[87][88][89] assuming G=1, i.e. neglecting the hydrodynamic interaction.…”

Section: Overview Of the Dlvo Approachmentioning

confidence: 99%

“…A number of authors [85,86,89] followed the approach given by Coen et al [8] and used the Debye-Huckel or the Gouy-Chapman equations to relate 0 σ to the surface potential 0 ψ , and then a Stern layer model to compute d ψ from 0 ψ . However, as noted by Melis et al [88], such a procedure seems to be incorrect since the Debye-Huckel and Gouy-Chapman equations cannot be used to relate 0 σ to the surface potential 0 ψ . An alternative formulation that overcomes this inconsistency was given by the same authors and recently extended by Sefcik et al…”

Section: Overview Of the Dlvo Approachmentioning

confidence: 99%

“…In the first instance, the obvious way to go around this interdependency problem would be to test the coagulation model under non-reacting conditions, as done by Melis et al [88] and Fortuny et al [85]. For example, the model could be compared with experimental data for the coagulation of monomer swollen particles or with experimental values of the stability ratio (obtained by turbidimetry, dynamic light scattering, etc.…”

Section: Experimental Validationmentioning

confidence: 99%

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Modeling particle size distribution in emulsion polymerization reactors

Vale

McKenna

2005

Progress in Polymer Science

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A review of the use and limitations of Population Balance Equations (PBE) in the modeling of emulsion polymerisation (EP), and in particular of the particle size distribution of the dispersed system is presented. After looking at the construction of the general form of PBEs for EP, a discussion of the different approaches used to model polymerization kinetics is presented. Following this, specific applications are presented in terms of developing a two-dimensional PBE for the modeling of more complex situations (for example the particle size distribution, PSD, and the composition of polymerizing particles). This review demonstrates that while the PBE approach to modeling EP is potentially very useful, certain problems remain to be solved, notably: the need to make simplifying assumptions about the distribution of free radicals in the particles in order to limit the computation complexity of the models; and the reliance of full models on approximate coagulation models. The review finishes by considering the different numerical techniques used to solve PBEs.

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Section: Dlvo-based Modelsmentioning

confidence: 99%

“…This equation was used in references [13,48,85,[87][88][89] assuming G=1, i.e. neglecting the hydrodynamic interaction.…”

Section: Overview Of the Dlvo Approachmentioning

confidence: 99%

Section: Overview Of the Dlvo Approachmentioning

confidence: 99%

Section: Experimental Validationmentioning

confidence: 99%

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Modeling particle size distribution in emulsion polymerization reactors

Vale

McKenna

2005

Progress in Polymer Science

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“…This equation is an extremely simplified version of the DLVO model and the only effect that is accounted for in this equation is the initiator concentration in the aqueous phase, since increasing electrolyte concentrations enhances the particle coagulation rate (Melis et al, 2000):…”

Section: Particle Coalescencementioning

confidence: 99%

Simulation of emulsion copolymerization reactions in a continuous pulsed sieve-plate column reactor

Sayer

Giudici

2004

Braz. J. Chem. Eng.

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-This work addressed the viability of using a pulsed sieve-plate column reactor to carry out continuous vinyl acetate/butyl acrylate emulsion copolymerization reactions. A rigorous mathematical model of emulsion copolymerization reactions in a tubular reactor with axial dispersion was used for this purpose. Operational conditions were defined to attain high monomer conversions at the reactor outlet in a relatively short residence time and, at the same time, produce a copolymer with a more homogeneous composition.

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