BPCPPDYSOE21 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 6: Poster Session I - Molecular Electronics and Wetting

CPP 6.17: Poster

Montag, 22. März 2021, 16:30–18:30, CPPp

Quantification of Interfacial Fracture in Geometrically Confined Soft Elastomers by a Combined Analysis of Contact Force and Pressure — •Hares Wahdat and Alfred Crosby — Polymer Science and Engineering Department, University of Massachusetts Amherst, Amherst, MA, USA

Interfacial fracture occurs in many different situations ranging from the failure of polymer adhesives to the growth of wounds in human skin. Commonly, interfacial fracture can be studied by inserting a needle into a soft material and apply positive pressure while recording images. The combination of pressure and corresponding images has revealed insight into the interfacial fracture properties of gels or biological tissues. Still, the need for recording images can complicate the study of non-transparent samples or in-vivo studies. Here, we present experiments, in which the pressure-change and the corresponding contact between a rigid probe in contact with micrometer-thin soft elastomers, were analyzed to quantify the critical strain energy release rate for interfacial fracture. The modeling of interfacial fracture does not require image recording, making our experiment and analysis suitable for quantitative studies of interfacial facture in complicated systems such as biological tissues.