Vitrimers: permanent organic networks with glass-like fluidity

Denissen, Wim; Winne, Johan M.; Prez, Filip Du

doi:10.1039/c5sc02223a

Cited by 1,185 publications

(1,267 citation statements)

References 62 publications

(54 reference statements)

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“…In recent years there has been increasing interest in a new class of crosslinked polymers becoming known as "Vitrimers". 29,30 These are crosslinked polymers with reversible bonds -strong organic glass formers that are able to change their topology through thermoactivated bond exchange reactions. At high temperatures, vitrimers can ow and behave like viscoelastic liquids, allowing them to be reprocessed like vitreous glass.…”

Section: Re-processingmentioning

confidence: 99%

Sustainable inverse-vulcanised sulfur polymers

2018

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We demonstrate two renewable crosslinkers that can stabilise sustainable high sulfur content polymers, via inverse-vulcanisation. With increasing levels of sulfur produced as a waste byproduct from hydrodesulfurisation of crude oil and gas, the need to find a method to utilise this abundant feedstock is pressing. The resulting sulfur copolymers can be synthesised relatively quickly, using a one-pot solvent free method, producing polymeric materials that are shape-persistent solids at room temperature and compare well to other inverse vulcanised polymers. The physical properties of these high sulfur polymeric materials, coupled with the ability to produce them sustainably, allow broad potential utility.

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Section: Re-processingmentioning

confidence: 99%

Sustainable inverse-vulcanised sulfur polymers

2018

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“…Here, we demonstrate how to design and implement an all-DNA system that constitutes the colloidal analog of poly-functional condensation but with the additional control of thermal reversibility and/or bond lifetime. This is a desirable step in the design of biocompatible systems with innovative dynamic properties such as DNAvitrimers 20 , networks with self-healing properties 21,22 . It also constitutes an advantageous stage for testing recent predictions on the long-range nature of the effective interaction between colloidal particles immersed in a solution which is itself close to percolation 23 .…”

Section: Introductionmentioning

confidence: 99%

Binding branched and linear DNA structures: From isolated clusters to fully bonded gels

Fernandez-Castanon

Bomboi

Sciortino

2018

The Journal of Chemical Physics

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The proper design of DNA sequences allows for the formation of well defined supramolecular units with controlled interactions via a consecution of selfassembling processes. Here, we benefit from the controlled DNA self-assembly to experimentally realize particles with well defined valence, namely tetravalent nanostars (A) and bivalent chains (B). We specifically focus on the case in which A particles can only bind to B particles, via appropriately designed sticky-end sequences. Hence AA and BB bonds are not allowed. Such a binary mixture system reproduces with DNA-based particles the physics of poly-functional condensation, with an exquisite control over the bonding process, tuned by the ratio, r, between B and A units and by the temperature, T . We report dynamic light scattering experiments in a window of T s ranging from 10°C to 55°C and an interval of r around the percolation transition to quantify the decay of the density correlation for the different cases. At low T , when all possible bonds are formed, the system behaves as a fully bonded network, as a percolating gel and as a cluster fluid depending on the selected r.

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“…This dynamic reaction is known to provoke the exchange of the side groups of the disulfide bridges in the presence of initiators or catalysts [5][6][7][8]. Once incorporated in the polymer network, these structures are capable of breaking and reforming linkages, and, as a consequence, these materials act as vitrimers, that is, solid polymers during their lifetime that under certain conditions can flow and thereby promote material healing [2,[9][10][11][12]. The capability of different disulfides to undergo disulfide metathesis reactions mainly depends on their chemical structures.…”

Section: Introductionmentioning

confidence: 99%

Autonomic healable waterborne organic-inorganic polyurethane hybrids based on aromatic disulfide moieties

Aguirresarobe¹,

Martin²,

Fernández‐Berridi³

et al. 2017

Express Polym. Lett.

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Abstract. Aromatic disulfide dynamic structures were incorporated as chain extenders in waterborne organic-inorganic polyurethane hybrids in order to provide autonomic healable characteristics. The synthesis was carried out following the acetone process methodology and the influence of the introduction of the healing agents in the polymer dispersion stability was analyzed. After the crosslinking process at room temperature, organic-inorganic hybrid films, which presented autonomic healing characteristics, were obtained. These features were evaluated by means of stress-strain tests and the films showed repetitive healing abilities. Thus, the optimum healing time at room temperature (25°C) as well as the influence of different parameters in the healing efficiency, such the aromatic disulfide concentration or the physical properties of the polymer matrix were analyzed.

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Vitrimers: permanent organic networks with glass-like fluidity

Abstract: Vitrimers possess the unique property that they are malleable while being permanently cross-linked. This mini-review highlights the existing vitrimer systems in the period 2011–2015 with the main focus on their chemical origin.

Cited by 1,185 publications

References 62 publications

Sustainable inverse-vulcanised sulfur polymers

Sustainable inverse-vulcanised sulfur polymers

Binding branched and linear DNA structures: From isolated clusters to fully bonded gels

Autonomic healable waterborne organic-inorganic polyurethane hybrids based on aromatic disulfide moieties

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