Preparation of Polystyrene Microspheres by Suspension Polymerization

2011 ◽  
Vol 233-235 ◽  
pp. 2215-2218 ◽  
Author(s):  
Jin Ling Ma ◽  
Xing Hua Zhang
Keyword(s):  
Particle Size ◽  
Size Distribution ◽  
Suspension Polymerization ◽  
Mass Ratio ◽  
Initiator Concentration ◽  
Polystyrene Microspheres ◽  
Average Size

Polystyrene (PS) microspheres with different sizes were prepared by suspension polymerization. The effect of initiator concentration on the average sizes and size distribution was evaluated. The results showed that the average size of PS microspheres increases with increasing initiator content, the optimal uniformity of PS microspheres was attained when the mass ratio of BPO to styrene was 1.5:100. The effect of stirring speed on the particle size was also investigated. The average size of PS microspheres reduced with the increase of the stirring speed.

On particle size distribution in suspension polymerization of styrene

1990 ◽  
Vol 55 (9) ◽  
pp. 2244-2251 ◽  
Author(s):  
Christina Apostolidou ◽  
Michael Stamatoudis
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Suspension Polymerization ◽  
Styrene Polymerization ◽  
Product Size ◽  
Factors Affecting ◽  
Stabilizer Concentration

Experiments were conducted on some of factors affecting the polymerized particle size distribution in suspension polymerization of styrene. Polymerization experiments with styrene at 80 °C showed that the final polystyrene product size distribution is strongly affected by the stabilizer concentration, the type and the speed of impeller, and the hold-up fraction.

Preparation and Characterization of Gold Nanoparticles in the Presence of Citrate and Soybean Seed Extract in an Acidic Conditions

Drug Research ◽  
2017 ◽  
Vol 67 (05) ◽  
pp. 266-270 ◽  
Author(s):  
Ebrahim Izadi ◽  
Ali Rasooli ◽  
Abolfazl Akbarzadeh ◽  
Soodabeh Davaran
Keyword(s):  
Particle Size ◽  
Gold Nanoparticles ◽  
Size Distribution ◽  
Average Particle Size ◽  
Soybean Seed ◽  
Average Particle ◽  
X Ray Diffraction ◽  
Soybean Extract ◽  
Average Size

AbstractThrough the present study, an eco-friendly method was used to synthesize the gold nanoparticles (GNPs) by using the sodium citrate and extract of the soybean seed as reducing the agents at PH 3. X-Ray diffraction (XRD) method was used to evaluate the crystal structure of as-synthesized NPs and it’s revealed that this method leads to well crystallized GNPs. In order to determine the particle size and their distribution, field emission scanning microscopy (FE-SEM) and dynamic light scattering (DLS) were used. The results showed that, the average particle size distribution of synthesized GNPs in solutions containing of the soybean extract and 1% citrate at PH 3 is about 109.6 and 140.9 nm, respectively. Also, we find that the average size of GNPs is 40 and 33 nm from solutions of citrate and soybean extract, respectively. It was concluded that using the extract of soybean seeds as reducing agent can lead to GNPs with small size and narrow size distribution.

Preparation of Uniform Hypercrosslinked Microspheres with Large Specific Surface Area

2011 ◽  
Vol 239-242 ◽  
pp. 1842-1845 ◽  
Author(s):  
Qing Zhou ◽  
Song Lin Tang ◽  
Man Cheng Zhang ◽  
Ai Min Li
Keyword(s):  
Particle Size ◽  
Specific Surface ◽  
Size Distribution ◽  
Surface Area ◽  
Specific Surface Area ◽  
Suspension Polymerization ◽  
Large Specific Surface Area ◽  
Narrow Size Distribution ◽  
Membrane Emulsification

The membrane emulsification-suspension polymerization (MESP) method was used to synthesize hypercrosslinked microspheres with a narrow size distribution. The resulting polymers possessed large specific surface area (over 1300 m2/g) and their particle size was controllable. The particles were more hydrophilic when using nitrobenzene as solvent instead of 1, 2-dichloroethane in the postcrosslinking process.

Calculation of the particle size distribution in suspension polymerization using a compartment-mixing model

1998 ◽  
Vol 76 (3) ◽  
pp. 495-505 ◽  
Author(s):  
Eduardo Vivaldo-Lima ◽  
Philip E. Wood ◽  
Archie E. Hamielec ◽  
Alexander Penlidis
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Suspension Polymerization ◽  
Mixing Model
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