Molecular Versus Conventional Kinetics of Emulsion Polymerization

Tauer, Klaus; Hernández, Hugo; Weber, Nancy; Roohi, Farnoosh

doi:10.1002/masy.201000082

Cited by 4 publications

(3 citation statements)

References 30 publications

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“…The approach where the formation of each individual chain and formation and growth of each individual latex particle is modelled seems to be necessary, requiring indeed multiscale integration techniques. However, too much mystification of these processes is not necessary 27 , because we have to realize that still a lot of aspects are unknown. In the first paper in this series 1 molecular weight distributions were predicted correctly with completely wrong (but compensating) kinetic parameters.…”

Section: Discussionmentioning

confidence: 99%

“…Klaus Tauer started a discussion a few years ago whether the common deterministic modeling approach is capable of predicting several phenomena in emulsion polymerizations, for example nucleation and variable lag times 27 . In this discussion he challenges the deterministic kinetics of emulsion polymerization and he propagates the use of molecular modeling and the application of multiscale integration techniques.…”

Section: New Approaches In Modeling Emulsion Polymerizationsmentioning

confidence: 99%

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Modeling of Emulsion Copolymerizations Will it Ever be Possible? Part III Conclusion

Herk

2012

j coll sci biotechnol

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In this paper some of the challenging aspects of modeling kinetics of emulsion copolymerizations will be discussed, giving a retrospective and a perspective on the area. In order to describe the fundamental processes in emulsion polymerization, like entry of radicals, many basic kinetic and thermodynamic coefficients are needed but still lacking. The important parameters in modeling emulsion copolymerizations will be discussed and some of the latest progress in the area will be highlighted.

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Section: Discussionmentioning

confidence: 99%

Section: New Approaches In Modeling Emulsion Polymerizationsmentioning

confidence: 99%

Modeling of Emulsion Copolymerizations Will it Ever be Possible? Part III Conclusion

Herk

2012

j coll sci biotechnol

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“…[28] Emulsion poly merization is widely used in polymer preparation because of a series of advantages, for example, free of solvent, fast poly merization rate, and capable of preparing polymers with high molecular weights. [2,24,[29][30][31] In emulsion polymerization, it is considered that the termination mode includes primary termination, coupling termination between the entering short-chain radicals and the existing chain radical, [2,24] but the effects of initiators with different substituents on initiation and termination mechanisms have not been studied in detail.…”

Section: Introductionmentioning

confidence: 99%

Initiation and Termination in Styrene Free‐Radical Polymerization Initiated by Redox Initiation

Han

Huang

et al. 2020

Macro Chemistry & Physics

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Hydrogen peroxide and hydroperoxides with substituents of different size are combined with ferrous sulfate to form redox initiation systems, which are used to initiate the polymerization of styrene in emulsion. Gas chromatography and size‐exclusion chromatography are used to measure the monomer conversion and the molecular weight of the polystyrene. Nuclear magnetic resonance is used to identify the characteristic structures, quantitative information is used to understand the polymerization. The results suggest that the initiation of the primary radicals directly depend on the size of the substitute, hydroxyl radical shows almost no selectivity between head‐addition and tail‐addition during initiation (Fhi = 47.4%). But for primary radicals with big substitute groups, for example, t‐butyl and cumyl hydroperoxides, tail‐addition takes advantages over head‐addition during initiation (Fhi ≈80%). As for the termination mechanism, it mainly depends on the solubility of the peroxide in water, the interfacial area of the particle as well as the diffusion rate of the primary radical in aqueous phase. Primary termination dominates in the polymerization initiated by hydroperoxide with poor solubility in water, for example, Fpt = 75–80% for t‐butyl and cumyl hydroperoxides. But Fpt is only 18.3% in the polymerization initiated by hydrogen peroxide (H2O2), indicating coupling termination predominately occurred because H2O2 has excellent solubility in water.

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Vapor phase composition and radical polymerization—how the gas phase influences the kinetics of heterophase polymerization

2012

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Molecular Versus Conventional Kinetics of Emulsion Polymerization

Cited by 4 publications

References 30 publications

Modeling of Emulsion Copolymerizations Will it Ever be Possible? Part III Conclusion

Modeling of Emulsion Copolymerizations Will it Ever be Possible? Part III Conclusion

Initiation and Termination in Styrene Free‐Radical Polymerization Initiated by Redox Initiation

Vapor phase composition and radical polymerization—how the gas phase influences the kinetics of heterophase polymerization

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