Identification of particle-particle interactions in suspension polymerization reactors

Hukkanen, Eric J.; Braatz, Richard D.

doi:10.1109/acc.2005.1470078

Cited by 4 publications

(5 citation statements)

References 15 publications

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“…Generally, suspension polymerization method offers particle size in the range of 5-200 μm [39]. Some published work reports the particle size of the beads in the range of 10-1000 μm [63,64]. Indeed, stirring speed of polymer composition significantly affects the particle size of the polymer.…”

Section: Particle Sizementioning

confidence: 99%

Effect of Chemical Crosslinking on Properties of Polymer Microbeads: A Review

Mane¹,

Ponrathnam²,

Chavan³

2016

Can Chem Trans

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Cross-link property has been used to improve the insolubility, mechanical strength, stiffness, and rigidity of polymer microbeads having potential applications in solid-phase synthesis, solid-phase extraction, and biomedical fields. Therefore synthesis of polymer with desired cross-linker (hydrophilic/hydrophobic/rigid/flexible) and concentration of cross-linker (cross-link density) is an important. In the present review, chemical cross-linking by free-radical, condensation, UV radiation, and small-molecule cross-linking are discussed in details. Further, effects of cross-linker (type/concentration) on polymer properties like surface area, pore volume, pore size, particle size, thermal degradation, glass transition temperature, and polymer swelling are also discussed. Importantly, present review discusses the influences of rigidity, flexibility, hydrophilicity, and hydrophobicity of a cross-linker on polymer properties.

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Section: Particle Sizementioning

confidence: 99%

Effect of Chemical Crosslinking on Properties of Polymer Microbeads: A Review

Mane¹,

Ponrathnam²,

Chavan³

2016

Can Chem Trans

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“…All in all at higher agitations in spherical reactor, the increase in non-ideal mixing can be understood in terms of non-spherical particles. This was attributed in literature [9,10,13,14,25] due to the domination of coagulation rate of droplets rather than the drop breakage mechanism.…”

Section: Molecular Weight Distribution Analysesmentioning

confidence: 92%

“…Both experimental and theoretical studies were carried out with constant reactor geometries and agitator types [9,[22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39]. Furthermore, cylindrical type reactors are selected for most of these particle size distribution investigations.…”

Section: Literaturementioning

confidence: 99%

Polistirenin Süspansiyon Polimerizasyonuyla Üretiminde Tanecik Boyutu Dağılımının Reaktör Geometrisi ve Karıştırma Koşulları ile İlişkisi

Erünal

2018

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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The relation between the reactor geometry and agitation conditions on particle size distribution for suspension polymerization of polystyrene was analyzed. The reactor geometries were selected as cylindrical and spherical, respectively. Mechanical agitation was provided via double-impeller Marine type propeller at 1600 rpm and 2000 rpm. The diameters of the reactors were selected approximately the same for cylindrical and spherical reactors in order to keep effective mixing area similar in both geometries. All experiments were conducted around 8 hours to complete the polymerization reaction. Particle size distribution analyses showed that at faster agitation conditions in cylindrical reactor narrower and smaller particles are obtained as expected. On the other hand, in spherical reactor, vortex formation and non-uniform particle size distribution were observed at faster agitation. Interestingly, when agitation speed was decreased in spherical reactor, quite narrower and smaller particle size distributions with respect to cylindrical reactor were obtained. However, the number and average molecular weight analyses suggested that the particles obtained from spherical reactor has a lower molecular weight distribution than particles from cylindrical reactor. This was attributed to the decrease in effective mixing area due to the non-homogenous changes of the distance between reactor walls and impellers throughout the spherical reactor. The geometry change to spherical geometry obviously causes diminishing in mass transfer of initiators and suspension stabilizers so that a shortening of polymer chains lead to a slight increase in polydispersity index.

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“…These 'measured' variables' are compared with the desired 'set-points' by the controller which then decides upon the control action by suitably adjusting the process conditions, i.e 'manipulated variables'. Similar control systems are used in emulsion polymerization [16][17][18][19][20][21], granulation processes [22,23] and crystallization process [4,24,25]. It can be inferred from the schematic that an accurate and robust on-line monitoring tool is vital to achieve the desired control objectives.…”

Section: Introduction To Microparticle Characterizationmentioning

confidence: 99%

“…It can be inferred from the schematic that an accurate and robust on-line monitoring tool is vital to achieve the desired control objectives. In addition to control objectives, these tools have also been used to study the kinetics of nucleation and growth of crystals [1,[26][27][28], sedimentation and settling of particles [29], polymer detection [19,20] and waste water treatment [30]. Hence the development of appropriate tool for on-line and precise particle size and shape measurement is of great interest for the researchers and industry.…”

Section: Introduction To Microparticle Characterizationmentioning

confidence: 99%

On-line monitoring of particulate processes using digital holography

Khanam¹

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Identification of particle-particle interactions in suspension polymerization reactors

Cited by 4 publications

References 15 publications

Effect of Chemical Crosslinking on Properties of Polymer Microbeads: A Review

Effect of Chemical Crosslinking on Properties of Polymer Microbeads: A Review

Polistirenin Süspansiyon Polimerizasyonuyla Üretiminde Tanecik Boyutu Dağılımının Reaktör Geometrisi ve Karıştırma Koşulları ile İlişkisi

On-line monitoring of particulate processes using digital holography

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