Macromol. React. Eng. 5/2012

Katzer, Johannes; Pauer, Werner; Moritz, Hans‐Ulrich; Wulkow, Michael

doi:10.1002/mren.201290012

Cited by 6 publications

(13 citation statements)

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“…Analyzing the experimental results in Figure 1, it can be observed that the polymerization reaction rates increased as the particle diameter was decreased, for all monomers, as expected when radical compartmentalization is important. This result is in agreement with that observed in experiments of thermal miniemulsion polymerization of styrene carried out by Alam et al31 and Katzer et al30…”

Section: Resultssupporting

confidence: 93%

“…As a result, some CLRP reactions can experience a decrease in the reaction rate with decreasing particle size 29. Katzer et al30 presented an experimental and theoretical study about the thermal polymerization (spontaneous initiation) of styrene in compartmentalized systems, providing some experimental data on thermally polymerized miniemulsions for varying reaction temperatures and droplet sizes. Alam et al31 also presented experimental results of thermal (spontaneous initiation) miniemulsion polymerizations of styrene where miniemulsions with smaller particles exhibited higher reaction rates, as a result of compartmentalization of propagating radicals.…”

Section: Introductionmentioning

confidence: 99%

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Compartmentalization Effects on Miniemulsion Polymerization with Oil‐Soluble Initiator

Costa¹,

Timmermann²,

Pinto³

et al. 2013

Macro Reaction Engineering

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A dynamic mathematical model is developed to represent miniemulsion polymerization reactions using oil‐soluble initiator. Both simulation and experimental results show that the evolution of conversion varies with particle diameter and that reactions become slower as the particle size is increased. For each experimental condition, a limiting diameter is obtained, above which the reaction kinetics does not change anymore with the diameter. These results are explained in terms of the compartmentalization of growing radicals during the miniemulsion polymerizations. The evolution of conversion in bulk polymerizations shows that the kinetic behavior above the limiting diameter is similar to the kinetic behavior of bulk reactions. magnified image

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Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Compartmentalization Effects on Miniemulsion Polymerization with Oil‐Soluble Initiator

Costa¹,

Timmermann²,

Pinto³

et al. 2013

Macro Reaction Engineering

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show abstract

“…This result demonstrates the reliability of in situ monitoring of styrene polymerization carried out for bulk, emulsion and miniemulsion process. In the case of bulk polymerization, the experimental results have been compared to theoretical calculations based on a kinetic model of styrene polymerization (scheme ) …”

Section: Resultsmentioning

confidence: 99%

“…Kinetic scheme of styrene radical polymerization with thermal initiation (two proposed mechanisms) and initiation by decomposition of dicumyl peroxide (DCP).…”

Section: Resultsmentioning

confidence: 99%

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In situ monitoring of styrene polymerization using Raman spectroscopy. Multi‐scale approach of homogeneous and heterogeneous polymerization processes

Brun

Youssef

Chevrel

et al. 2013

J Raman Spectroscopy

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International audienceFree radical polymerization of styrene was monitored in situ by combining Raman spectroscopy to other experimental techniques (gravimetry and rheology). Three different processes were investigated: bulk, emulsion and miniemulsion polymerization. A complete analysis of the evolution of Raman spectrum during the course of reaction showed that a lot of information about molecular dynamics could be extracted and related to chemical phenomena. In addition, we report for the first time the coupling of Raman spectroscopy to a rheometer in order to monitor styrene bulk polymerization both at the scale of chemical bonds and at the scale of macroscopic phenomena (viscosity variation)

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Synthesis of Core‐Shell Particles with Low Molecular Weight Alkanes by Miniemulsion Polymerization

Capeletto

Silva

Sayer

et al. 2014

Macromolecular Symposia

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Summary Miniemulsion polymerization technique was used to obtain core‐shell nanoparticles with a core of low molecular weight alkanes and a polystyrene shell. Reactions were performed at 80°C for 5 hours using benzoyl peroxide as oil‐soluble initiator. The effect of different alkane types, namely n‐hexadecane, n‐octane and n‐heptane, and initiator concentrations on reaction rates, particle sizes, molecular weights and particles morphology were evaluated. When shorter chain alkanes as n‐heptane and n‐octane were used it was observed lower reaction rates, higher particle sizes and less sharp particle morphology than in reactions with hexadecane in which well formed core‐shell particles were obtained. These results were assigned to the plasticizing effect and higher water‐solubility of n‐octane and n‐heptane, responsible for decreasing the gel effect and favoring the diffusional degradation.

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Macromol. React. Eng. 5/2012

Cited by 6 publications

References 0 publications

Compartmentalization Effects on Miniemulsion Polymerization with Oil‐Soluble Initiator

Compartmentalization Effects on Miniemulsion Polymerization with Oil‐Soluble Initiator

In situ monitoring of styrene polymerization using Raman spectroscopy. Multi‐scale approach of homogeneous and heterogeneous polymerization processes

Synthesis of Core‐Shell Particles with Low Molecular Weight Alkanes by Miniemulsion Polymerization

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