Quantifying and mapping covalent bond scission during elastomer fracture

  title={Quantifying and mapping covalent bond scission during elastomer fracture},
  author={Juliette Slootman and Victoria Waltz and C. Joshua Yeh and Christoph Baumann and Robert Gost and Jean Comtet and Costantino Creton},
  journal={arXiv: Soft Condensed Matter},
Many new soft but tough rubbery materials have been recently discovered and new applications such as flexible prosthetics, stretchable electrodes or soft robotics continuously emerge. Yet, a credible multi-scale quantitative picture of damage and fracture of these materials has still not emerged, due to our fundamental inability to disentangle the irreversible scission of chemical bonds along the fracture path from dissipation by internal molecular friction. Here, by coupling new fluorogenic… 
7 Citations

Figures and Tables from this paper

Visualization of Bond Scission due to Nucleation and Growth of Gas Bubbles in Elastomers
When an elastomer is saturated with gas and then rapidly decompressed, small cavities may nucleate, inflate, and deflate inside the material. This phenomenon, herein considered as a type of…
Fracture of polymer networks with diverse topological defects.
It is shown that the fracture energy of polymer networks should account for the energy from multiple layers of polymer chains adjacent to the crack, and that the presence of topological defects tends to toughen a polymer network by increasing the effective chain length, yet to weaken the polymer networks by introducing inactive polymer chains.
One-Component DNA Mechanoprobes for Facile Mechanosensing in Photopolymerized Hydrogels and Elastomers.
The system makes decisive steps forward for DNA-based mechanoprobes by overcoming the classical multicomponent design of such probes, allowing photopolymerization useful for the design of complex objects or even 3D printing and demonstrating that such motifs may even be useful in dry bulk materials.
Stretchy molecules rupture far from the crack
Newly observed molecular consequences of fracturing in an elastic sheet reveal some surprises.


Mechanics of elastomeric molecular composites
A model system of molecular composites where the filler is a continuous network embedded into a stretchy matrix, and it is demonstrated that the elastomer undergoes a strong localized softening due to scission of covalent bonds followed by a stable necking process, a phenomenon never observed before in elastomers.
Fracture and adhesion of soft materials: a review.
This review discusses the current state of the art on how soft materials break and detach from solid surfaces and defines the important length scales in the problem and in particular the elasto-adhesive length Ξ“/E, which controls the fracture mechanisms.
Covalent Bond Scission in the Mullins Effect of a Filled Elastomer: Real‐Time Visualization with Mechanoluminescence
Strain‐induced light emission from mechanoluminescent cross‐linkers in silica‐filled poly(dimethylsiloxane) demonstrates that covalent bond scission contributes significantly to irreversible…
Toughening Elastomers with Sacrificial Bonds and Watching Them Break
Using sacrificial bonds, this work shows how brittle, unfilled elastomers can be strongly reinforced in stiffness and toughness by introducing a variable proportion of isotropically prestretched chains that can break and dissipate energy before the material fails.
Fracture toughness of hydrogels: measurement and interpretation.
This article discusses the experimental measurement and theoretical interpretation of the fracture toughness for soft hydrogels, and the physical mechanisms responsible for the rate-dependence, and outlines the difficulties to rigorously define the fracture Toughness for both crack initiation and propagation.
Force-induced activation of covalent bonds in mechanoresponsive polymeric materials
It is found that pronounced changes in colour and fluorescence emerge with the accumulation of plastic deformation, indicating that in these polymeric materials the transduction of mechanical force into the ring-opening reaction is an activated process.
The Fracture of Highly Deformable Soft Materials: A Tale of Two Length Scales
The physics of cracks in soft materials are discussed and two length scales that characterize the strongly nonlinear elastic and dissipation zones near crack tips in such materials are highlighted.
Fatigue of hydrogels
Mechanoresponsive self-growing hydrogels inspired by muscle training
A strategy for developing β€œself-growing” polymeric materials that respond to repetitive mechanical stress through an effective mechanochemical transduction is proposed and may pave the way for the development of self-growing gel materials for applications such as soft robots and intelligent devices.
Experimental Polymer Mechanochemistry and its Interpretational Frameworks.
  • S. Akbulatov, R. Boulatov
  • Materials Science
    Chemphyschem : a European journal of chemical physics and physical chemistry
  • 2017
This review aims at systematizing reported macroscopic manifestations of polymer mechanochemistry, and critically assessing the interpretational framework that underlies their molecular rationalizations from a physical chemist's perspective, and proposes a hierarchy of mechanochemical phenomena.