Polymer films prepared using ionically crosslinked soft core–shell nanoparticles: a new class of nanostructured ionomers

Pinprayoon, Orawan; Groves, Robert; Lovell, Peter A.; Tungchaiwattana, Somjit; Saunders, Brian R.

doi:10.1039/c0sm00447b

Cited by 18 publications

(27 citation statements)

References 45 publications

(78 reference statements)

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“…Those core-shell nanoparticles were prepared using 1,3-butadiene (Bd), acrylonitrile (AN) and methacrylic acid (MAA). The proportions of AN and MAA and extents of neutralisation were shown to affect the modulus values 8,9 . Whilst those nanostructured ionomer films had good ductility, their modulus values were low.…”

Section: Introductionmentioning

confidence: 97%

“…However, elastomeric films constructed using core-shell nanoparticles containing COOH groups have received less attention. Our previous work introduced ductile nanostructured elastomeric films prepared by casting films from aqueous dispersions of low glass transition temperature (T g ) core-shell nanoparticles in the presence of ZnO 8,9 . The latter was used to neutralise the surface -COOH groups and introduced ionic inter-particle crosslinking.…”

Section: Introductionmentioning

confidence: 99%

“…The overwhelming majority of ionomer films studied to date have been prepared by casting films of linear polymers from organic solvent-based solutions 20 or using compounding 21 or compression molding 15,22 . However, there has been relatively little work reported for nanostructured ionomeric films prepared from aqueous dispersions 8,9 , which is an approach with obvious environmental benefits.…”

Section: Introductionmentioning

confidence: 99%

“…Previously, we explored the structure-property relationships for low modulus Bd-based coreshell nanostructured ionomer films and probed methods for controlling their mechanical properties 9,23,24 . For those soft films it was shown that inclusion of AN was an effective method for tuning the modulus of the films 8 .…”

Section: Introductionmentioning

confidence: 99%

“…AN is known to increase the surface hardness 25 , modulus 26 and tensile strength 27 and thermal stability 28,29 of copolymers due to the strong polarity of nitrile groups 28 and strong molecular interactions 30 . However, all of our previous nanostructured ionomer films used Bd as the main structural monomer 9,23,24 . For the coreshell systems, Bd compromised more than ~ 70 wt.% of the nanoparticles and the Young;s modulus values were less than 12 MPa 8, 9, 24 .…”

Section: Introductionmentioning

confidence: 99%

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Tuning the modulus of nanostructured ionomer films of core–shell nanoparticles based on poly(n-butyl acrylate)

et al. 2016

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ABSTRACT:In this study we investigate the structure-mechanical property relationships for nanostructured ionomer films containing ionically crosslinked core-shell polymer nanoparticles based on poly(n-butyl acrylate) (PBA). Whilst nanostructured ionomer films of core-shell nanoparticles have been previously shown to have good ductility [Soft Matter, 10, 4725, 2014], the modulus values were modest. Here, we used BA as the primary monomer to construct core-shell nanoparticles that provided films containing nanostructured polymers with much higher glass transition temperature (T g ) values. The core-shell nanoparticles were synthesised using BA, acrylonitrile (AN), methacrylic acid (MAA) and 1, 4-butanediol diacrylate (BDDA). Nanostructured ionomer films were prepared by casting aqueous coreshell nanoparticle dispersions in which the shell -COOH groups were neutralised with KOH and ZnO. The film mechanical properties were studied using dynamic mechanical analysis and tensile stress-strain measurements. The use of BA-based nanoparticles increased the T g values to close to room temperature which caused a strong dependence of the film mechanical properties on the AN content and extent of neutralisation of the -COOH groups.The Young's modulus values for the films ranged from 1.0 to 86.0 MPa. The latter is the highest modulus reported for cast films of nanostructured ionomer films prepared from coreshell nanoparticles. The films had good ductility with strain-at-break values of at least 200%.The mechanical properties of the films were successfully modelled using the isostrain model.From comparison with an earlier butadiene-based system this study demonstrates that the 2 nature of the primary monomer used to construct the nanoparticles can profoundly change the film mechanical properties. The aqueous nanoparticle dispersion approach used here provides a simple and versatile method to prepare high modulus elastomer films with tuneable mechanical properties.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tuning the modulus of nanostructured ionomer films of core–shell nanoparticles based on poly(n-butyl acrylate)

et al. 2016

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Film Formation of Two‐Stage Acrylic Latexes: Toward Soft‐Core/Hard‐Shell Systems

Lopes Brito,

Ballard

2023

Macro Materials & Eng

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Controlling the colloidal structure of multiphase latex particles offers a route to significant improvements in the mechanical properties of dried films for use in coatings. However, there is often conflict between the morphology that leads to optimum mechanical properties and the morphology that ensures good film formation at reduced temperatures. In this work, the case of two‐stage latex particles in which the second‐stage polymer has a high glass transition temperature (Tg) is considered. First, a number of different core/shell‐like particles with different polymer compositions and particle structures are synthesized by seeded semi‐batch emulsion polymerization. Using these latexes, the importance of phase mixing, particle morphology, and polymer composition with respect to film formation behavior and mechanical performance is discussed. The results highlight that in multiphase latex systems, the film formation behavior is dictated by the interplay between various colloidal and polymeric features of the samples. It is shown that understanding these features offers a route to systems that can match the film formation properties of a low Tg latex, whilst also approaching the mechanical properties of a high Tg polymer.

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Hard Coatings from Soft Latexes: A Review of Routes to Overcome the Film Formation Dilemma

Jiménez,

Ballard,

Asua

2024

Macro Materials & Eng

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The use of polymer latexes for high‐performance coatings is challenging as the properties required to allow for film formation at reasonable temperatures tend to result in films with relatively poor mechanical properties. In this review, routes to overcome this so‐called film‐formation dilemma are discussed. First, the use of coalescing agents, focusing in particular on more recent approaches to minimize the use of volatile organic compounds (VOCs), is reviewed. Subsequently, approaches that utilize hybrid latexes are considered. This includes the use of high/low Tg latex blends, nanocomposites that include a second, non‐polymeric phase, and multiphase latexes. Finally, the use of crosslinking technologies is considered, with a focus on necessary developments to reduce environmental impact. The review concludes with a summary and a discussion of possible future directions for research.

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Polymer films prepared using ionically crosslinked soft core–shell nanoparticles: a new class of nanostructured ionomers

Cited by 18 publications

References 45 publications

Tuning the modulus of nanostructured ionomer films of core–shell nanoparticles based on poly(n-butyl acrylate)

Tuning the modulus of nanostructured ionomer films of core–shell nanoparticles based on poly(n-butyl acrylate)

Film Formation of Two‐Stage Acrylic Latexes: Toward Soft‐Core/Hard‐Shell Systems

Hard Coatings from Soft Latexes: A Review of Routes to Overcome the Film Formation Dilemma

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