2025/01/01 by Elina Gilbert, Anniina Salonen, Christophe Poulard · 1 voice
Engineering · Materials Science · #Composite Material Mechanics #Material Dynamics and Properties #Polymer Nanocomposites and Properties
paper · doi:10.1039/d5sm00973a
openalex publication_date 2025/01/01 · openalex created_date 2025/10/31 · openalex updated_date 2026/07/22
Understanding a material's dissipative response is important for their use in many applications, such as adhesion or fracture resistance. In dispersions, the interplay between matrix and inclusions complicates any description. Fractional rheology is conveniently used to fit the storage and loss moduli of complex materials. In conjugation with superposition methods, they allow to better capture the behavior of materials of complex rheology. We study the rheology of soft solid/liquid composites of liquid poly(ethylene glycol) (PEG) droplets in a soft poly(dimethylsiloxane) (PDMS) matrix. We analyze the influence of the droplets through fractional rheology and a time-concentration superposition in the continuous-phase-dominated region. Viscous dissipation increases proportionally with volume fraction, independently of the frequency, whereas the elastic response is almost unchanged.