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Article Dans Une Revue Physical Review Letters Année : 2011

Structural Signature of a Brittle-to-Ductile Transition in Self-Assembled Networks

Laurence Ramos
Christian Ligoure
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We study the nonlinear rheology of a novel class of transient networks, made of surfactant micelles of tunable morphology reversibly linked by block copolymers. We couple rheology and time-resolved structural measurements, using synchrotron radiation, to characterize the highly nonlinear viscoelastic regime. We propose the fluctuations of the degree of alignment of the micelles under shear as a probe to identify a fracture process. We show a clear signature of a brittle-to-ductile transition in transient gels, as the morphology of the micelles varies, and provide a parallel between the fracture of solids and the fracture under shear of viscoelastic fluids.
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hal-00628223 , version 1 (07-06-2021)

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Laurence Ramos, Arnaud Laperrousaz, Philippe Dieudonné, Christian Ligoure. Structural Signature of a Brittle-to-Ductile Transition in Self-Assembled Networks. Physical Review Letters, 2011, 107, pp.148302. ⟨10.1103/PhysRevLett.107.148302⟩. ⟨hal-00628223⟩
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