Heat-induced crack healing in a perfluorocyclobutane-containing polymer

Cho, Sung-Youl; Kim, Joong‐Gon; Oh, Se‐Young; Chung, C.

doi:10.1007/s13233-009-0177-x

Cited by 11 publications

(16 citation statements)

References 19 publications

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“…However, this was not investigated in detail, since there the focus was placed on crack formation events in solid state materials. [27][28][29][30] The first study by Kim and co-workers in 2004 focused on light-triggered healing of the material after crack formation induced by grinding in the solid state. 27 Cinnamoyl moieties were used to construct cyclobutane-based mechanophores that in the cleaved state would show high and bathocromically shifted absorptivity to undergo light-induced [2 + 2] cycloaddition (Scheme 3).…”

Section: Four-membered Carbocyclesmentioning

confidence: 99%

Polymer mechanochemistry-enabled pericyclic reactions

et al. 2020

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Section: Four-membered Carbocyclesmentioning

confidence: 99%

Polymer mechanochemistry-enabled pericyclic reactions

et al. 2020

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“…39 The decomposition onset temperature (T d ) as another important parameter to determine the thermal stability of polymer materials, is defined as the temperature at 5% weight loss of the sample from TGA tests. increases with a higher proportion of oxazolidones which are believed to own higher thermal stability compared to isocyanurates, 32 while the char formation increases with higher proportion of isocyanurates, as shown in Fig.7 (B).…”

Section: Thermal Analysis and Mechanical Properties Of Isox Polymersmentioning

confidence: 87%

“…31 Oya et al 14 proved the mechano-chemical reversibility of A-M DA adducts by UV/vis spectroscopy. Chung et al 32 verified mechanical damage and thermal repair of perfluorocyclobutane (PFCB) groups by ATR-IR, and Craig et al 33 utilized 19 F-NMR to further confirm this mechano-chemical reversibility. Our work shows that the isocyanurate rings are dissociated by mechanical stress to generate free isocyanates, which allows repeatable crack mending under thermal stimulus.…”

Section: Introductionmentioning

confidence: 99%

High service temperature, self-mendable thermosets networked by isocyanurate rings

Zhang

Julé

Sodano

2017

Polymer

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A new mending chemistry exhibiting stability at extreme temperatures and holding mechanical properties as well as mechanical stability comparable to widely used engineering plastics is reported here. This mendable thermoset polymer is synthesized using commodity reactants through the formation of a isocyanurate-oxazolidone network which exhibit a high service temperature as shown by their T g of 270°C and T d of 365°C. We demonstrate that this network polymer is repeatedly self-mendable in the presence of a macroscopic crack, yielding considerable recovery of the polymer's strength after thermal annealing. This self-mending behavior is derived from a high density of mechano-responsive isocyanurate rings which are introduced as cross-links in the network. After mechanically initiated cycloreversion, the recovery of isocyanurate rings in a solid state is thermally initiated. This research is the first demonstration of an isocyanurate ring as a repairing moiety. We developed a new class of intrinsic self-mendable polymers withstanding high temperatures, which will greatly impact the application of thermoset polymers in the field of structural laminates and electronics packaging.

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“…The design of stimuli responsive-healing polymeric systems involves the encapsulation of effective healing agents in desired polymeric systems followed by activation employing external stimuli, such as heating, which is a popular way to regain the structural integrity in structurally damaged polymers (Cho, Kim, Oh, & Chung, 2010). After heating, the healing agent moves to the damaged part and promotes the self-healing by initiating suitable polymeric entanglements.…”

Section: Introductionmentioning

confidence: 99%

Stimuli responsive ion gels based on polysaccharides and other polymers prepared using ionic liquids and deep eutectic solvents

Prasad¹,

Mondal

Sharma

et al. 2018

Carbohydrate Polymers

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Ion gels and self-healing gels prepared using ionic liquids (ILs) and deep eutectic solvents (DESs) have been largely investigated in the past years due to their remarkable applications in different research areas. Herewith we provide an overview on the ILs and DESs used for the preparation of ion gels, highlight the preparation and physicochemical characteristics of stimuli responsive gel materials based on co-polymers and biopolymers, with special emphasis on polysaccharides and discuss their applications. Overall, this review summarizes the fundamentals and advances in ion gels with switchable properties prepared using ILs or DESs, as well as their potential applications in electrochemistry, in sensing devices and as drug delivery vehicles.

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Heat-induced crack healing in a perfluorocyclobutane-containing polymer

Cited by 11 publications

References 19 publications

Polymer mechanochemistry-enabled pericyclic reactions

Polymer mechanochemistry-enabled pericyclic reactions

High service temperature, self-mendable thermosets networked by isocyanurate rings

Stimuli responsive ion gels based on polysaccharides and other polymers prepared using ionic liquids and deep eutectic solvents

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