The effect of cluster plasticisation on the self healing behaviour of ionomers

Varley, Russell J.; Shen, Shirley; Zwaag, Sybrand van der

doi:10.1016/j.polymer.2009.12.025

Cited by 115 publications

(86 citation statements)

References 12 publications

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“…Essential for this self-healing at the molecular level is an ionic interaction (bonds that can be broken and linked again). 12 The distance between the two partners has to be sufficiently small (in the nanometer range) to ensure a high probability of linking two chains together ionically.…”

Section: Introductionmentioning

confidence: 99%

Timescales of self-healing in human bone tissue and polymeric ionic liquids

Akbarzadeh¹,

Puchegger²,

Stojanovic³

et al. 2014

Bioinspired, Biomimetic and Nanobiomaterials

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Strain (stress-free) relaxation in mechanically prestrained bone has a time constant of 75 s. It occurs by a reorganization of the proteoglycan-glycoprotein matrix between collagen fibers, which requires ionic interactions. Dissolving and relinking the ionic bonds is thus an important tool of nature to enable plastic deformation and to develop self-healing tissues. A way to transfer this approach to technical materials is the attachment of ionic end groups to polymeric chains. In these classes of materials, the so-called polymeric ionic liquids, structural recovery of thermally disorganized material is observed. A time constant between minutes and a week could be achieved, also by ionic rearrangement.The same mechanism, rearrangement of ionic bonds, can lead to vastly different relaxation times when the ionic interaction is varied by exchange of the cationic end groups or the anions.

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Section: Introductionmentioning

confidence: 99%

Timescales of self-healing in human bone tissue and polymeric ionic liquids

Akbarzadeh¹,

Puchegger²,

Stojanovic³

et al. 2014

Bioinspired, Biomimetic and Nanobiomaterials

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show abstract

“…The findings correlate with the proposed two-stage mechanism. Later, Varley and van der Zwaag intensively studied the ionomer Surlyn 8940 with this method [156,167,170]. In addition, the authors investigated the influence on the self-healing process of using different projectiles of varying size, weight, shape, and velocity.…”

Section: Self-healing Under Ballistic Impactmentioning

confidence: 99%

“…Additionally, aliphatic di-and tricarboxylic acid-based modifiers (oxalic acid, succinic acid, adipic acid, citric acid, and sebacic acid) and the corresponding amides of sodium-neutralized analogs were added to the ionomer blend (10 wt%). In situ mechanical evaluation illustrated that only the carboxylic acid derivates reduced the elastic properties and improved the elastomeric behavior, resulting in better healing [170]. Further work from Varley and van der Zwaag pointed out that the penetration of a bullet triggers three contiguous events in the ionomer: an initial elastic response, an inelastic response, and then pseudo-brittle failure [167].…”

Section: Self-healing Under Ballistic Impactmentioning

confidence: 99%

Intrinsic Self-Healing Polymers Based on Supramolecular Interactions: State of the Art and Future Directions

Enke

Döhler

Bode

et al. 2015

Self-Healing Materials

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Supramolecular polymers are an intriguing class of materials with dynamic behavior as a result of the presence of non-covalent bonds. These bonds include hydrogen bonds, metallopolymers, ionomers, host-guest as well as π-π interactions. The strength of these supramolecular bonds can be tuned by varying the binding motifs. Their reversible and dynamic character can be utilized to engineer self-healing polymers. This review briefly presents the preconditions for design of self-healing polymers and summarizes the development of supramolecular self-healing polymers based on various non-covalent interactions. Furthermore, challenges and perspectives for the understanding of self-healing mechanisms and the preparation of novel materials with enhanced properties are discussed.

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“…In a number of quasi-static pull through studies at various temperatures, Varley et al [28,29] unravelled the various processes involved in healing of ionomeric polymers. In more recent work, the role of the physical network in self healing behaviour has been further elucidated by adding carboxylic acid based modifiers and their analogues to affect the local charge build up and the healing strength [30]. Current work on ionomeric polymers focuses on the healing of surface scratches in order to create self healing floorings or coatings.…”

Section: Reversible Physical Crosslinkingmentioning

confidence: 99%

Routes and mechanisms towards self healing behaviour in engineering materials

Zwaag¹

2010

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. Modern man-made engineering materials demonstrate excellent mechanical properties, but the lack of the ability of self healing, i.e. the ability to remove or neutralise microcracks without (much) intentional human interaction, which is typical for most materials as encountered in nature. Such self-healing behaviour requires the presence of mobile species, atoms or molecules, in an otherwise solid material. Upon the occurrence of damage the mobile species directionally flow towards the damage location and once arrived there restores the contact between the two crack faces and the mechanical integrity. This directional flow may occur during regular use conditions (self healing behaviour) or conditions during which the mobility is temporarily increased (stimulated self healing).In this manuscript a brief overview of the routes and mechanisms which have been used to create self healing behaviour in the principal classes of engineering materials: polymers, metals, ceramics, concrete, asphalt, fibre composites, is presented.

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The effect of cluster plasticisation on the self healing behaviour of ionomers

Cited by 115 publications

References 12 publications

Timescales of self-healing in human bone tissue and polymeric ionic liquids

Timescales of self-healing in human bone tissue and polymeric ionic liquids

Intrinsic Self-Healing Polymers Based on Supramolecular Interactions: State of the Art and Future Directions

Routes and mechanisms towards self healing behaviour in engineering materials

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