Mechanics of elastomeric molecular composites

Proceedings of the National Academy of Sciences of the United States of America
Pierre MillereauCostantino Creton

Abstract

A classic paradigm of soft and extensible polymer materials is the difficulty of combining reversible elasticity with high fracture toughness, in particular for moduli above 1 MPa. Our recent discovery of multiple network acrylic elastomers opened a pathway to obtain precisely such a combination. We show here that they can be seen as true molecular composites with a well-cross-linked network acting as a percolating filler embedded in an extensible matrix, so that the stress-strain curves of a family of molecular composite materials made with different volume fractions of the same cross-linked network can be renormalized into a master curve. For low volume fractions (<3%) of cross-linked network, we demonstrate with mechanoluminescence experiments 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. The quantification of the emitted luminescence shows that the damage in the material occurs in two steps, with a first step where random bond breakage occurs in the material accompanied by a moderate level of dissipated energy and a second step where a moderate level of more localized bond scission leads to a...Continue Reading

References

Nov 17, 2001·Chemical Reviews·K Y Lee, D J Mooney
Mar 27, 2010·Science·John A RogersYonggang Huang
Apr 12, 2014·Science·Etienne DucrotCostantino Creton
Jan 13, 2015·Science·Ivan R MinevStéphanie P Lacour
Mar 24, 2016·Reports on Progress in Physics·Costantino Creton, Matteo Ciccotti
Apr 15, 2008·Soft Matter·Guillaume Miquelard-GarnierDominique Hourdet

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Citations

Apr 28, 2020·Soft Matter·Claudia Ferreiro-CórdovaMehdi Bouzid
May 23, 2020·Science Advances·Yinjun ChenCostantino Creton
Feb 6, 2021·Chemical Society Reviews·Yinjun ChenRint P Sijbesma
Jan 21, 2021·Physical Review. E·Vahid MorovatiRoozbeh Dargazany
May 4, 2021·Advanced Materials·Yizhi ZhuoZhiliang Zhang
Jan 11, 2020·The Journal of Physical Chemistry Letters·Xue-Zheng CaoChen-Xu Wu
Oct 5, 2021·Macromolecules·Justin TauberJasper van der Gucht

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