On the Kinetics of Heterogeneous Free Radical Crosslinking Polymerization<sup>1)</sup>

Capek, Ignác

doi:10.1080/01932699608943496

Cited by 4 publications

(2 citation statements)

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“…Finally, Capek (1996) presented a review on the kinetics of heterogeneous (emulsion, dispersion, and suspension) free-radical cross-linking polymerization. This review and the paper of Vivaldo-Lima et al (1994b) provide a complete overview of the state of the art on modeling of free-radical cross-linking polymerization kinetics.…”

Section: Conventional Modelingmentioning

confidence: 99%

An Updated Review on Suspension Polymerization

Vivaldo‐Lima

Wood

Hamielec

et al. 1997

Ind. Eng. Chem. Res.

279

259

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An updated review on suspension polymerization is presented. The time period from 1991 to 1995 is stressed, as well as research articles or reports not considered in previous reviews. Our review is aimed at providing a sound basis for the theoretical background required to build an effective model for the particle size distribution (PSD) in suspension polymerization. All major phenomena that affect the PSD are considered, and a proposed approach to develop an accurate, yet simple, model is included. Most of the experimental information in this review is related to the styrene/divinylbenzene copolymerization system, although the ideas and models are not exclusive to this system.

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Section: Conventional Modelingmentioning

confidence: 99%

An Updated Review on Suspension Polymerization

Vivaldo‐Lima

Wood

Hamielec

et al. 1997

Ind. Eng. Chem. Res.

279

259

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“…The question now emerging is why ñ increases are so high with the increase in the organic-phase dosing rate. The probable cause would be that proposed by Capek [28], who stated that the cross-linked polymer chains would trap the propagating radicals. It is believed that these chains would act as barriers preventing two radicals encounter, thereby retarding the bimolecular termination reactions and consequently, extending the life span of the radicals inside the particles.…”

Section: Resultsmentioning

confidence: 99%

Effect of Monomer Dosing Rate in the Preparation of Mesoporous Polystyrene Nanoparticles by Semicontinuous Heterophase Polymerization

Sosa¹,

Guillén²,

Saade³

et al. 2014

Molecules

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Abstract:The semicontinuous heterophase polymerization of styrene in the presence of cross-linking and porogen agents was carried out. Latexes with close to 20% solid content, which contained mesoporous nanoparticles with 28 nm in average diameters, up to 0.5 cm 3 /g in porosity and 6-8 nm in pore diameters were obtained. By varying the monomer dosing rate over the micellar solution, an unexpected direct dependence of instantaneous conversion on the monomer dosing rate was found. This was ascribed to the higher average number of radicals per particle attained in the polymerization at the higher dosing rate, which in turn would arise from the higher gel percentage in the polymer. It is believed that the cross-linked chains prevent encounters between radicals, delaying the bimolecular termination reactions and allowing the existence of more than one radical inside the particles, which in turn increases the propagation rate.

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