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Chlorotrifluoroethylene Suspension Polymerization
2002Polychlorotrifluoroethylene (PCTFE) is ordinarily prepared by emulsion polymerization. A polymer suitable for thermal processing requires coagulation, extensive washing, and postpolymerization workup. Coagulation to provide a filterable and washable solid is a slow, difficult process and removal of surfactant is an important part of it.
Milton H. Andrus +3 more
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Micron‐sized polymeric microsphere by suspension polymerization
Journal of Applied Polymer Science, 1993AbstractA new suspension polymerization process that generates narrow‐size distribution and spherical particles in the range of 3–10 microns is described. In the new process, the monomer and water phases are held in separate vessels and fed at an accurate rate to a mechanical disperser, where small, uniform droplets of monomer are formed.
Masafumi Kamiyama +3 more
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Semi‐suspension polymerization process
Macromolecular Symposia, 1996AbstractA novel heterogeneous polymerization process for synthesizing particulate with a wide range of properties has been developed. This process, which is called semi ‐ suspension polymerization (SSP), consists of two steps. In the first step a mixture of monomer, polymer, initiator, and other required ingredients is prepared by means of a non ...
Hadi K. Mahabadi, Denise Wright
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DROP DISPERSION IN SUSPENSION POLYMERIZATION
Chemical Engineering Communications, 1982Four models, two based on laminar shear and two based on turbulent flow, are proposed to describe drop dispersion in non-coalescing systems. The models predict the largest surviving drop size dmax as a function of geometry, speed and physical property variables. Laboratory data including suspension polymerization runs support the boundary layer laminar
D.E. LENG, G.J. QUARDERER
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An Updated Review on Suspension Polymerization
Industrial & Engineering Chemistry Research, 1997An updated review on suspension polymerization is presented. The time period from 1991 to 1995 is stressed, as well as research articles or reports not considered in previous reviews. Our review is aimed at providing a sound basis for the theoretical background required to build an effective model for the particle size distribution (PSD) in suspension ...
Eduardo Vivaldo-Lima +3 more
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Acrylonitrile polymerization in aqueous suspension
Journal of Polymer Science, 1957AbstractPolymerization of acrylonitrile in dilute aqueous solution initiated by the chloratesulfite redox was studied kinetically and with the aid of the electron microscope. Polymerization rate depended on the [ClO] [H2SO3] product, the monomer content and the sodium lauryl sulfate concentration.
W. M. Thomas, E. H. Gleason, G. Mino
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Aqueous Suspension Polymerizations
1989Polymerization processes in heterogeneous systems are of considerable interest because they offer many practical advantagesin industrial applications.1,2 Among these heterogeneous processes are emulsion and suspension polymerizations of monomers dispersed in an aqueous phase.
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Morphology of suspension polymerized polyacrylamide
Journal of Materials Science Letters, 1985In the course of studies on the characterization of commercial polyacrylamides used in tertiary oil recovery, samples of BASF Sepaflood suspension polymerized polyacrylamide with varying degrees of hydrolysis were observed using a Hitachi S-450 scanning electron microscope. Figs !
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Inverse suspension polymerization of acrylamide
Polymer Science U.S.S.R., 1991Abstract The effect of the concentrations of acrylamide, potassium persulphate, initiator, ethoxylated anhydrosorbitol stearate emulsifier, and the aqueous phase/toluene phase ratio on the kinetic relationships of the inverse suspension polymerization of acrylamide was studied by thermometry.
L.L Stupenkova +3 more
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Inverse suspension polymerization of acrylamide
European Polymer Journal, 1982Abstract The polymerization of acrylamide in inverse suspension is described and compared with polymerization in solution. The influences of various factors upon the molecular weight of the polymer were studied, viz. the concentration of initiator, the procedure of aqueous phase addition, the nature and concentration of emulsifier, the salt ...
M.V. Dimonie +5 more
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