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Article Dans Une Revue International Journal of Non-Linear Mechanics Année : 2016

Temperature-driven volume transition in hydrogels: Phase-coexistence and interface localization

Résumé

We study volume transition phenomenon in hydrogels within the framework of Flory–Rehner thermodynamic modelling; we show that starting from different models for the Flory parameter different conclusions can be achieved, in terms of admissible coexisting equilibria of the system. In particular, with explicit reference to a one-dimensional problem we establish the ranges of both temperature and traction which allow for the coexistence of a swollen and a shrunk phase. Through consideration of an augmented Flory–Rehner free-energy, which also accounts for the gradient of volume changes, we determine the position of the interface between the coexisting phases, and capture the connection profile between them.

Dates et versions

hal-01362198 , version 1 (06-06-2024)

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E.N.M. Cirillo, P. Nardinocchi, Giulio Sciarra. Temperature-driven volume transition in hydrogels: Phase-coexistence and interface localization. International Journal of Non-Linear Mechanics, 2016, 81, ⟨10.1016/j.ijnonlinmec.2016.01.005⟩. ⟨hal-01362198⟩

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