Critical Field Strength in an Electroclinic Liquid Crystal Elastomer
Christopher M. Spillmann, Amit V. Kapur, Frank W. Bentrem, Jawad, Naciri, and Banahalli R. Ratna
TL;DR
This paper investigates the polymer dynamics of an electroclinic liquid crystal elastomer, revealing a critical electric field strength where the response transitions to entangled polymer behavior, affecting switching times.
Contribution
It identifies a critical field strength in liquid crystal elastomers where polymer dynamics shift, linking molecular tilt behavior to entanglement transitions.
Findings
Maximum switching time at intermediate electric fields
Transition to entangled polymer dynamics at a critical field
Correlation between molecular tilt and polymer entanglement
Abstract
We elucidate the polymer dynamics of a liquid crystal elastomer based on the time-dependent response of the pendent liquid crystal mesogens. The molecular tilt and switching time of mesogens are analyzed as a function of temperature and cross-linking density upon application of an electric field. We observe an unexpected maximum in the switching time of the liquid crystal mesogens at intermediate field strength. Analysis of the molecular tilt over multiple time regimes correlates the maximum response time with a transition to entangled polymer dynamics at a critical field strength.
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