Surfactant-free poly(vinylidene chloride) latexes via one-pot RAFT-mediated aqueous polymerization

Velasquez, Émilie; Rieger, Jutta; Stoffelbach, François; D’Agosto, Franck; Lansalot, Muriel; Dufils, Pierre-Emmanuel; Vinas, Jérôme

doi:10.1016/j.polymer.2016.08.083

Cited by 32 publications

(35 citation statements)

References 34 publications

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“…The macroRAFT agent (either PMAA or PSSNa) was synthesized as described in the literature. 36,37 The aqueous macroRAFT agent solution was used in the following without further purification.…”

Section: Methodsmentioning

confidence: 99%

Enhanced Water Barrier Properties of Surfactant-Free Polymer Films Obtained by MacroRAFT-Mediated Emulsion Polymerization

Martín-Fabiani

Haye

Schulz

et al. 2018

ACS Appl. Mater. Interfaces

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The presence of low-molar-mass surfactants in latex films results in detrimental effects on their water permeability, gloss, and adhesion. For applications such as coatings, there is a need to develop formulations that do not contain surfactants and have better water barrier properties. Having previously reported the synthesis of surfactant-free latex particles in water using low amounts (<2 wt %) of chains synthesized by controlled radical polymerization (Lesage de la Haye et al. Macromolecules 2017, 50, 9315-9328), here we study the water barrier properties of films made from these particles and their application in anticorrosion coatings. When films cast from aqueous dispersions of acrylate copolymer particles stabilized with poly(sodium 4-styrenesulfonate) (PSSNa) were immersed in water for 3 days, they sorbed only 4 wt % water. This uptake is only slightly higher than the value predicted for the pure copolymer, indicating that the negative effects of any particle boundaries and hydrophilic-stabilizing molecules are minimal. This sorption of liquid water is 5 times lower than what is found in films cast from particles stabilized with the same proportion of poly(methacrylic acid) (PMAA), which is more hydrophilic than PSSNa. In water vapor with 90% relative humidity, the PSSNa-based film had an equilibrium sorption of only 4 wt %. A small increase in the PMAA content has a strong and negative impact on the barrier properties. Nuclear magnetic resonance relaxometry on polymer films after immersion in water shows that water clusters have the smallest size in the films containing PSSNa. Furthermore, these films retain their optical clarity during immersion in liquid water for up to 90 min, whereas all other compositions quickly develop opacity ("water whitening") as a result of light scattering from sorbed water. This implies a remarkably complete coalescence and a very small density of defects, which yields properties matching those of some solvent-borne films. The latex stabilized with PSSNa is implemented as the binder in a paint formulation for application as an anticorrosive barrier coating on steel substrates and evaluated in accelerated weathering and corrosion tests. Our results demonstrate the potential of self-stabilized latex particles for the development of different applications, such as waterborne protective coatings and pressure-sensitive adhesives.

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Section: Methodsmentioning

confidence: 99%

Enhanced Water Barrier Properties of Surfactant-Free Polymer Films Obtained by MacroRAFT-Mediated Emulsion Polymerization

Martín-Fabiani

Haye

Schulz

et al. 2018

ACS Appl. Mater. Interfaces

Self Cite

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“…To this end, different approaches have been developed to improve the water whitening resistance of latex films, such as using polymerizable or reactive surfactants, macromolecular surfactant, no surfactant, increasing the density of the polymer network by using crosslinking agents, removing water‐soluble species by centrifugation, dialysis, precipitation, using ion exchange resins, and so forth, adjusting the pH of the emulsion, copolymerizing fluoride monomers preparation of polymer latex with multiple layer core–shell structure, and so forth…”

Section: Introductionmentioning

confidence: 99%

Glass‐transition temperature of a polyacrylate latex film and its water whitening resistance

Luo

Huang

2019

J of Applied Polymer Sci

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Polyacrylate latex materials have become a hot area recently in China due to its environmental friendliness. However, the water whitening resistance of the polyacrylate latex products in the market is largely unsatisfactory, which seriously affects the appearance and performance of the latex products. In this work, the effect of glass‐transition temperature (Tg) of a polyacrylate latex film on its water whitening resistance was investigated. The light transmittance measurement showed that the higher the Tg of the latex film, the better the water whitening resistance. Atomic force microscope, surface element analysis, static water contact angle measurement, and attenuated total reflection–Fourier transform infrared were used to characterize the accumulation of the emulsifier on the surface of the latex film. It was found that the amount of emulsifier migrated to the surface of the latex film increased with the increase of the Tg of the latex film, that is, the amount of emulsifier remained inside the latex film decreased, thereby reducing its affinity to water. In addition, the higher the Tg of the latex film, the lower the water absorption, also reducing the affinity of the latex film to water. Both work together to improve the water whitening resistance of polyacrylate latex film with higher Tg. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48361.

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“…With the advantage of producing concentrated nanoparticles on a larger scale, PISA has great potential to address the challenges inherent in the scaling‐up nanomaterial synthesis, one of the major obstacles hindering the market reach of nanoparticle drug delivery systems . Further, emulsion polymerization, one of the two ways to conduct PISA, is environmentally friendly and widely used in industry . In PISA, the shape of nanoparticles can be easily controlled, therefore enabling fundamental studies into the role of nanoparticle shape in drug delivery.…”

Section: Biomedical Applications Of Pisa Nanoparticlesmentioning

confidence: 99%

“…In recent years, the increasing need for nanoparticles with tunable size and shape for various biomedical applications has stimulated significant efforts by polymer chemists to improve the PISA technique. From a simple methodology that could produce only spherical polystyrene nanoparticles, PISA has rapidly matured to become a powerful technique capable of producing a myriad of nanoparticle morphologies including worm, vesicle, lamella, etc . In this feature article, we do not aim to exhaustively account for every paper concerning the synthesis and application of PISA nor do we aim to critically anaylze the PISA literature.…”

Section: Introductionmentioning

confidence: 99%

Controlling Nanomaterial Size and Shape for Biomedical Applications via Polymerization‐Induced Self‐Assembly

Khor

Quinn

Whittaker

et al. 2018

Macromol. Rapid Commun.

139

135

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Rapid developments in the polymerization-induced self-assembly (PISA) technique have paved the way for the environmentally friendly production of nanoparticles with tunable size and shape for a diverse range of applications. In this feature article, the biomedical applications of PISA nanoparticles and the substantial progress made in controlling their size and shape are highlighted. In addition to early investigations into drug delivery, applications such as medical imaging, tissue culture, and blood cryopreservation are also described. Various parameters for controlling the morphology of PISA nanoparticles are discussed, including the degree of polymerization of the macro-CTA and core-forming polymers, the concentration of macro-CTA and core-forming monomers, the solid content of the final products, the solution pH, the thermoresponsitivity of the macro-CTA, the macro-CTA end group, and the initiator concentration. Finally, several limitations and challenges for the PISA technique that have been recently addressed, along with those that will require further efforts into the future, will be highlighted.

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Surfactant-free poly(vinylidene chloride) latexes via one-pot RAFT-mediated aqueous polymerization

Cited by 32 publications

References 34 publications

Enhanced Water Barrier Properties of Surfactant-Free Polymer Films Obtained by MacroRAFT-Mediated Emulsion Polymerization

Enhanced Water Barrier Properties of Surfactant-Free Polymer Films Obtained by MacroRAFT-Mediated Emulsion Polymerization

Glass‐transition temperature of a polyacrylate latex film and its water whitening resistance

Controlling Nanomaterial Size and Shape for Biomedical Applications via Polymerization‐Induced Self‐Assembly

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