Mechanical measurements of heterogeneity and length scale effects in PEG-based hydrogels.

@article{Bush2015MechanicalMO,
  title={Mechanical measurements of heterogeneity and length scale effects in PEG-based hydrogels.},
  author={Brian Bush and Jenna M. Shapiro and Frank W DelRio and Robert F. Cook and Michelle L Oyen},
  journal={Soft matter},
  year={2015},
  volume={11 36},
  pages={
          7191-200
        }
}
Colloidal-probe spherical indentation load-relaxation experiments with a probe radius of 3 μm are conducted on poly(ethylene glycol) (PEG) hydrogel materials to quantify their steady-state mechanical properties and time-dependent transport properties via a single experiment. PEG-based hydrogels are shown to be heterogeneous in both morphology and mechanical stiffness at this scale; a linear-harmonic interpolation of hyperelastic Mooney-Rivlin and Boussinesq flat-punch indentation models was… CONTINUE READING

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