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.

scholarly journals Factors affecting the particle size distribution and rheology of brinzolamide ophthalmic suspensions

2020 ◽  
Vol 586 ◽  
pp. 119495 ◽  
Author(s):  
Anh Vo ◽  
Xin Feng ◽  
Deval Patel ◽  
Adil Mohammad ◽  
Darby Kozak ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Factors Affecting

Effect of the particulate morphology of resin on the gelation process of PVC plastisols

2017 ◽  
Vol 37 (8) ◽  
pp. 757-764 ◽  
Author(s):  
Yubi Ji ◽  
Zhao Yang ◽  
Min Shi ◽  
Hong Tan
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Key Factors ◽  
Factors Affecting ◽  
Gelation Process ◽  
Secondary Particles ◽  
Poly Vinyl Chloride ◽  
Opposite Behavior

Abstract The gelation process of poly(vinyl chloride) (PVC) plastisol is very important to ensure the quality of the product and is affected by the type of resins, plasticizers, and other additives. In this study, the gelation process of the as-prepared PVC plastisol was characterized by measuring the evolution of vibrational viscosity with temperature or time using a vibrational viscometer. Furthermore, the effect of some commercial resins with different particulate morphologies on the gelation process was investigated by synchronously combining scanning election microscopy and laser particle size analyses. The results of this study proved that the particle size distribution and the aggregation degree of the secondary particles of a resin are the key factors affecting the gelation process. For the resin with bimodal particle size distribution, the closer the aggregation of the secondary particles, the slower the gel speed; however, an opposite behavior was observed for the resins with unimodal particle size distribution.

Анализ параметров медицинского технологического оборудования, учитывающие факторы, влияющие на качество изготовления лекарств

2020 ◽  
pp. 90-95
Author(s):  
T.V. Karlova ◽  
◽  
D.O. Sv ◽  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Particle Shape ◽  
Particle Surface ◽  
Technological Equipment ◽  
Factors Affecting ◽  
Particle Strength ◽  
The Web

The article is devoted to the analysis of parameters of medical technological equipment that take into account factors affecting the quality of manufacture of drugs. Factors such as particle size, particle size distribution, particle shape, particle surface properties, particle strength, which, based on the «Web» method, are used to analyze the «vibrosieve» technological equipment, are considered.

SIEVING OF POWDERS ADDITIVE AND POWDER MANUFACTURINGS (review)

2020 ◽  
pp. 11-20
Author(s):  
A.E. Knyazev ◽  
◽  
A.V. Vostrikov ◽  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Metal Powder ◽  
Metal Powders ◽  
Technological Properties ◽  
Factors Affecting ◽  
Ultrasonic Cleaning

Considers the features of powders obtained by various methods, their technological properties in relation to additive and granular manufacturing. The sequence of operations upon receipt of metal powder compositions is presented. The factors affecting the process of vibration sieving of metal powders and granules are described. The features and advantages of vibratory sieving on horizontally arranged circular sieves using ultrasonic cleaning to obtain specified trajectories of motion are shown. Criteria for evaluating the sieving efficiency are given and explanations are given for determining the particle size distribution of powders and granules.

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