Sintering of latex particles in pigmented coatings. II. Influence of the latex particle size

1981 ◽  
Vol 26 (3) ◽  
pp. 799-808 ◽  
Author(s):  
B. Alince ◽  
P. Lepoutre
Keyword(s):  
Particle Size ◽  
Latex Particle ◽  
Latex Particles ◽  
Pigmented Coatings

Theoretical Consideration of Interfacial Forces Involved in Coalescence of Latex Particles

1967 ◽  
Vol 40 (4) ◽  
pp. 1246-1269 ◽  
Author(s):  
J. W. Vanderhoff ◽  
H. L. Tarkowski ◽  
M. C. Jenkins ◽  
E. B. Bradford
Keyword(s):  
Contact Angle ◽  
Particle Size ◽  
Interfacial Tension ◽  
Theoretical Consideration ◽  
Latex Particle ◽  
Flat Surface ◽  
Film Formation ◽  
Latex Particles ◽  
Interfacial Tensions ◽  
Interfacial Forces

Abstract The Dillon, Matheson, and Bradford and the Brown hypotheses for the mechanism of film formation of latexes are extended, two latex particles in a drop of water being given as a model. As the water evaporates, the particles are brought together, so that their stabilizing layers are in contact and their further approach is hindered. The pressure forcing the particles together is increased by the further evaporation of water (that is, by the forces arising from the water air interfacial tension), until the stabilizing layers are ruptured and a polymer polymer contact is formed. Once this occurs, the pressure exerted upon the particles is increased further by the forces arising from the polymer water interfacial tension. Numerical values for the pressure exerted upon the particles are calculated as a function of latex particle size, degree of coalescence, and interfacial tensions both of water against air and polymer against water. Similar calculations with a latex particle coalescing against a flat surface (for example, a substrate) as a model demonstrate the importance of the contact angle between the polymer and the flat surface. The hypotheses developed are used to explain various experimental observations.

scholarly journals Aspects of Latex Particle Size Control for Improved Water Blush Resistance

Scanning ◽  
2008 ◽  
Vol 30 (2) ◽  
pp. 78-86 ◽  
Author(s):  
Natasha Starostin ◽  
Scott Harvey ◽  
Gary Carlson
Keyword(s):  
Particle Size ◽  
Latex Particle ◽  
Size Control ◽  
Particle Size Control

Influence of the Hydrophile-Lipophile Property of Cross-Linker on the Properties of Acrylate Latex and its Film

2012 ◽  
Vol 441 ◽  
pp. 466-472
Author(s):  
Ming Hua Wu ◽  
Jian Peng Dong ◽  
Dong Ming Qi ◽  
Chong Qian ◽  
Xin Jiang
Keyword(s):  
Particle Size ◽  
Ethylene Glycol ◽  
Tensile Properties ◽  
Latex Particle ◽  
Latex Film ◽  
Cross Linking ◽  
Pseudoplastic Fluid ◽  
Film Forming ◽  
Acrylate Latex ◽  
Cross Linker

A series of acrylate latexes for pigment printing binder were prepared by semi-continuous pre-emulsifying emulsion polymerization, using lipophilic glycidyl meth-acrylate (GMA), ethylene glycol dimethyl acrylate (EGDMA) and hydrophilic HA (containing hydroxyl, acylamino), N-methylol acrylamide (NMA) as cross-linking monomer. The influences of cross-linker type on the particle size, viscosity and film-forming rate of latex, cross-linking degree and tensile properties of latex film were studied. It was found that the latex particle size, viscosity and film-forming rate were closely related with the hydrophile-lipophile property of cross linkers. The acrylate latex synthesized with hydrophilic cross-linkers always exhibits the characteristics of larger particle size, lower film-forming rate, higher viscosity and pseudoplastic fluid. The cross-linking degree and tensile properties of latex film generally depend on the crosslinking groups of cross-linkers and their reactivity.

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.

Swelling of Latex Particles

1959 ◽  
Vol 32 (3) ◽  
pp. 814-824
Author(s):  
Maurice Morton ◽  
Samuel Kaizerman ◽  
Mary W. Altier
Keyword(s):  
Molecular Weight ◽  
Particle Size ◽  
Interfacial Energy ◽  
Average Particle Size ◽  
Particle Diameter ◽  
Polystyrene Latex ◽  
Average Particle ◽  
Equilibrium Solubility ◽  
Latex Particles ◽  
Equilibrium Swelling

Abstract A theoretical relation has been derived for the equilibrium swelling of latex particles. The equilibrium solubility and rate of solution of solvents were measured on a series of polystyrene latex fractions of varying particle size. The solvents used were styrene, toluene, and chlorocyclohexane. It was found, as predicted by theory, that the equilibrium amount of solvent imbibed by latex particles is a direct function of the particle diameter and an inverse function of the interfacial energy at the surface of the particles. The molecular weight of the polymer has no effect on the equilibrium swelling, within the range from 100,000 to several million molecular weight units. The rate of imbibition of these solvents appears to be extremely rapid, indicating that equilibrium solubility would appear to be maintained in most polymerization reactions. The fact that a particular solvent is a “good” solvent for the polymer does not necessarily result in a greater swelling of the particles, since the solvent may show a higher interfacial energy against the aqueous phase. The soap titration method is best for determining the average particle size of a latex for purposes of predicting equilibrium swelling.

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