Emulsion polymerization of methyl methacrylate in concentration of emulsifiers below their CMCs—polymerization rate, particle size, and particle-size distribution

1995 ◽  
Vol 55 (8) ◽  
pp. 1209-1215 ◽  
Author(s):  
Zai-Zhang Yu ◽  
Bo-Geng Li ◽  
Ming-Jian Cai ◽  
Bao-Fang Li ◽  
Kun Cao
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Methyl Methacrylate ◽  
Size Distribution ◽  
Emulsion Polymerization ◽  
Polymerization Rate

Semibatch Seeded Emulsion Polymerization of Acrylic Monomers: Bimodal Particle Size Distribution

1997 ◽  
Vol 34 (7) ◽  
pp. 1221-1236 ◽  
Author(s):  
Chorng-Shyan Chern ◽  
Tseng-Jung Chen ◽  
Shinn-Yih Wu ◽  
Horng-Bin Chu ◽  
Chun-Fu Huang
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Emulsion Polymerization ◽  
Seeded Emulsion Polymerization ◽  
Acrylic Monomers

Effects of Emulsifier Concentration on Nucleation Mode of Emulsion Polymerization of Styrene

2013 ◽  
Vol 395-396 ◽  
pp. 399-402 ◽  
Author(s):  
Li Bao Mei ◽  
Xiao Qin Xiao ◽  
Yong Li ◽  
Yan Lin Sun
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Emulsion Polymerization ◽  
Homogeneous Nucleation ◽  
Particle Number ◽  
Nucleation Mode ◽  
P Fraction ◽  
Emulsifier Concentration

The nucleation mode of emulsion polymerization of styrene under different emulsifier (SDS) concentrations is studied in this paper. Some factors such as conversion, particle number (Np), fraction of coverage, polydispersion index (PDI) and particle size distribution (PSD) of the reactions were investigated. The results show that when [SD is less than its CMC, homogeneous nucleation dominates. But when [SD is more than its CMC, micelle nucleation plays the major role.

scholarly journals Preparation and Characterization of Latex Particles as Potential Physical Shale Stabilizer in Water-Based Drilling Fluids

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Junyi Liu ◽  
Zhengsong Qiu ◽  
Wei’an Huang ◽  
Dingding Song ◽  
Dan Bao
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Methyl Methacrylate ◽  
Size Distribution ◽  
Pore Pressure ◽  
Water Medium ◽  
Gravimetric Analysis ◽  
Latex Particles ◽  
Pressure Transmission ◽  
Ft Ir

The poly(styrene-methyl methacrylate) latex particles as potential physical shale stabilizer were successfully synthesized with potassium persulfate as an initiator in isopropanol-water medium. The synthesized latex particles were characterized by Fourier transform infrared spectroscopy (FT-IR), particle size distribution measurement (PSD), transmission electron microscopy (TEM), and thermal gravimetric analysis (TGA). FT-IR and TGA analysis confirmed that the latex particles were prepared by polymerization of styrene and methyl methacrylate and maintained good thermal stability. TEM and PSD analysis indicated that the spherical latex particles possessed unimodal distribution from 80 nm to 345 nm with the D90 value of 276 nm. The factors influencing particle size distribution (PSD) of latex particles were also discussed in detail. The interaction between latex particles and natural shale cores was investigated quantitatively via pore pressure transmission tests. The results indicated that the latex particles as potential physical shale stabilizer could be deformable to bridge and seal the nanopores and microfractures of shale to reduce the shale permeability and prevent pore pressure transmission. What is more, the latex particles as potential physical shale stabilizer work synergistically with chemical shale stabilizer to impart superior shale stability.

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