Commentary on "Mechanical properties of mono-domain side chain nematic elastomers" by P. Martinoty et al., Eur. Phys. J. E 14, 311 (2004)

TL;DR

This paper reviews rheology experiments on nematic elastomers, analyzing theoretical models for their dynamics, and discusses how these models can be adapted to explain experimental observations related to soft elasticity.

Contribution

It provides a critical discussion of existing theories on nematic elastomer rheology and proposes modifications to better match experimental data.

Findings

Theoretical models can be adapted for non-hydrodynamic regimes

Soft and semi-soft elasticity concepts are relevant to experimental results

Phenomenological descriptions help interpret rheology data

Abstract

We discuss the rheology experiments on nematic elastomers by Martinoty et al. in the light of theoretical models for the long-wavelength low-frequency dynamics of these materials. We review these theories and discuss how they can be modified to provide a phenomenological description of the non-hydrodynamic frequency regime probed in the experiments. Moreover, we review the concepts of soft and semi-soft elasticity and comment on their implications for the experiments.