Ordering of latex particles during film formation

Joanicot, M.; Davidson, T.N.; Maquet, J.; Chevalier, Yves; Pichot, Christian; Graillat, C.; Lindner, Peter; Ríos, Leonardo; Cabane, Bernard

doi:10.1007/bfb0115548

Cited by 98 publications

(51 citation statements)

References 14 publications

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“…The extent of particle deformation dependent on T mff has been studied using turbidity measurements 9. According to some authors2–5 the rupture of the surfactant layer, separating the deformed latex particles, is prerequisite to encouraging polymer interdiffusion and developing mechanical strength 26. For drying well above T mff particle deformation and polymer diffusion will be sufficiently strong to destroy the network of hydrophilic surfactant material to form a nonporous film.…”

Section: Latex Film Formationmentioning

confidence: 99%

“…A large number of experimental techniques have been used to investigate different aspects of spacing and deformation of the latex particles: Structural changes in films cast from soft particles protected by hydrophilic membranes have been extensively studied by small‐angle neutron scattering (SANS) 4–7. The same technique has also been applied to study particle coalescence and surfactant desorption during film formation from carboxylated acrylic latices 8.…”

Section: Introductionmentioning

confidence: 99%

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Drying and film formation of industrial waterborne latices

et al. 2007

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Experimental evidence is given for the mechanism of film formation from industrial waterborne latices using Inverse‐Micro‐Raman‐Spectroscopy (IMRS). In the vertical direction of the film drying is gas‐side controlled, indicated by uniform water concentration profiles. In the horizontal direction inhomogeneous drying resulting from a horizontal mass flux toward the edge of the film and the formation of a drying front are observed. The completeness of film formation is tested by so‐called IMRS redispersion experiments. For hard latices (Texperiment ≃ Tmff) particle deformation is incomplete and the final coating—although transparent and optically clear—is a porous structure with a network of surfactant material located at the particle interfaces. The use of a film‐forming aid lowers the polymer's minimum film formation temperature (Tmff) and facilitates particle deformation and polymer interdiffusion. The result is a nonporous film structure where individual particles and a network of surfactant material are no longer observed. IMRS redispersion experiments are compared with pictures of the final coating surface obtained from atomic force microscopy (AFM). © 2007 American Institute of Chemical Engineers AIChE J, 2007

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Section: Latex Film Formationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Drying and film formation of industrial waterborne latices

et al. 2007

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“…Some factors (uniform particle size, low ionic strength) promote ordering of the dispersion in the liquid state. 36 It is likely that order in the fluid phase at high solids will strongly influence particle packing in the film. This is particularly important in films prepared from mixtures of latex ("latex blends") of different sizes or different compositions, where localization of the components or phase separation in the dispersion carries forward into the film.…”

Section: Film Formation Mechanismmentioning

confidence: 99%

Functional latex and thermoset latex films

Taylor¹,

Winnik

2004

J Coat. Technol. Res.

108

124

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We review advances in the design and development of functional latex particles that can be used to form crosslinked coatings. Our emphasis is on understanding fundamental principles, of the formation and aging of latex films, of crosslinking of polymer films, of the reaction mechanisms that lead to bond formation, and of the competition between bond formation and polymer diffusion in latex films. These principles form the basis for the design of modern coatings that combine high performance with environmental compliance.

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“…The use of neutron scattering experiments SANS , together with SEMrTEMrAFM has permitted the 'observation' of the latex particle structure during film drying; allowing the three-dimensionally deformed shape of the latex w x w x particles to be studied. Joanicot et al 94 and Chevalier et al 73 have studied the Ž particle packing of latices consisting of a soft hydrophobic polystyrene-poly butyl . w acrylate copolymer core, stabilised by a hydrophilic shell either neutralised Ž .…”

Section: ␥mentioning

confidence: 99%

Advances in colloid and inter face science

Kitchener

1967

Journal of Electroanalytical Chemistry and Interfacial Electroc

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The literature on polymer latex film formation has grown enormously in recent times ᎏ driven by the need to find alternatives for solvent-based systems with their adverse environmental impacts. Although greater insight has been shown by the use of modern instrumental techniques such as small angle neutron scattering, direct non-radiative energy transfer and atomic force microscopy, the actual mechanisms involved in deforming spherical particles into void-free films are still the subject of controversy and debate. Surfactant-free homopolymer model colloid latices, favoured in academic studies, together with latices containing surfactants whose redistribution can influence film properties, and the more complex copolymer, blended, core-shell and pigmented systems needed to satisfy a full range of film properties are all considered. ᮊ

show abstract

Ordering of latex particles during film formation

Cited by 98 publications

References 14 publications

Drying and film formation of industrial waterborne latices

Drying and film formation of industrial waterborne latices

Functional latex and thermoset latex films

Advances in colloid and inter face science

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