Influence of Morphology on Film Formation of Acrylic Dispersions

Heuts, M. P. J.; FEBRE, R. A. LE; Hilst, J. L. M. van; Overbeek, G. C.

doi:10.1021/bk-1996-0648.ch018

Cited by 18 publications

(16 citation statements)

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“…Of particular interest for coatings are the polymers with more than one glass transition temperature. 56 A composition which is polymerized sequentially, whereby the monomers are split to deliver a T g difference, can give both a reduction in MFT and show a reduced thermoplasticity as well, when compared to the same composition which is polymerized as a one phase polymer 57 (see Tables 2 and 3). This feature makes sequential polymers with a T g difference between both phases specifically useful for applications where fast drying and low VOC need to be combined.…”

Section: Sequentially Produced Free Radical Polymersmentioning

confidence: 99%

Polymer heterogeneity in waterborne coatings

Overbeek

2009

J Coat Technol Res

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An overview is presented of the progress in understanding polymer heterogeneity over the last 20 years and how this has contributed to the improvement of coatings. Solvent-based polymers are homogeneous in nature, since all polymeric materials tend to be dissolved in the same solvent mixture. This is different for most waterborne polymers, which tend to be present in a compartmentalized way. Most polymeric materials are present in particles, which are separated by the continuous aqueous phase. This gives excellent opportunities to create particle morphologies that form the basis for the film morphology after drying of the coating. This article gives an overview of the various types of heterogeneity which are accessible in waterborne polymers and will show how heterogeneity in the polymer can contribute to the solution of several persistent problems of the coating industry.

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Section: Sequentially Produced Free Radical Polymersmentioning

confidence: 99%

Polymer heterogeneity in waterborne coatings

Overbeek

2009

J Coat Technol Res

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“…In this case, unlike latex blends, a more homogeneous distribution of the two phases throughout the polymer film is acheived . One common approach is to use particles with a core–shell morphology consisting of a hard core, which reinforces the film, and a soft shell, which allows for film formation at acceptable temperatures . Such core–shell morphology is relatively easily synthesized by seeded emulsion polymerization, where the seed forms the core of the final particle .…”

Section: Introductionmentioning

confidence: 99%

Soft core–hard shell latex particles for mechanically strong VOC‐free polymer films

Limousin

Ballard

Asúa

2019

J of Applied Polymer Sci

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Polymer films cast from aqueous polymer dispersions typically suffer from an inherent lack of mechanical strength when compared to their solvent-borne counterparts. This drawback can be overcome by the use nanostructured hybrid particles that contain both a hard and soft phase. In this work, we demonstrate the use latex particles consisting of a soft core with a multilobed hard shell synthesized by seeded semicontinuous emulsion polymerization with the aim of maximizing the interconnectivity of the hard phase in the resulting polymer film, thus generating films with improved mechanical properties. Films with a minimum film formation temperature (MFFT) close to that of the soft phase are formed while obtaining a Young's modulus up to 4.5 times higher that of a standard homogeneous latex particle. The effect of annealing temperature on film morphology is also investigated, clearly demonstrating that a marked difference in mechanical properties is observed when a percolating network of the hard phase within the film is obtained.

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“…In recent years, the core-shell emulsion prepared by multistage polymerization is gradually attracting substantial attention [17][18][19][20][21][22][23][24][25][26][27] because of its some more excellent performances over conventional emulsion, such as lower minimum film formation temperature [28] (MFT), greater control of particle size [29] . etc.…”

Section: Introductionmentioning

confidence: 99%

The Relation Between Particle Structure and the Peel Strength of Vinyl Acetate/Acrylate Core-Shell Latexes Laminating Adhesives

Wang

Lei

et al. 2012

Polymer-Plastics Technology and Engineering

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The cross-linkable laminating adhesives (LAs) based on core-shell vinyl acetate/acrylate latexes were synthesized through multistage emulsion polymerization. The effects of core copolymer T g , core/shell weight ratio, cross-linking structure and molecular structure on the peel strength of LAs were studied. It was found that peel strength increases with the decrease of core/shell weight ratio and core copolymer T g . And cross-linking structure could improve adhesion properties of LAs evidently. Moreover, the molecular structure of core-shell latexes has a significant influence on adhesion properties of LAs. The peel strength of sample 14-H could reach 3.4 N/15 mm even under 60 C by particle structure design.

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Influence of Morphology on Film Formation of Acrylic Dispersions

Cited by 18 publications

References 0 publications

Polymer heterogeneity in waterborne coatings

Polymer heterogeneity in waterborne coatings

Soft core–hard shell latex particles for mechanically strong VOC‐free polymer films

The Relation Between Particle Structure and the Peel Strength of Vinyl Acetate/Acrylate Core-Shell Latexes Laminating Adhesives

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