Mechanochromic polyurethane strain sensor

F. Cellini, Sachin Khapli, S. D. Peterson, Maurizio Porfiri

Research output: Contribution to journalArticle

Abstract

In this Letter, we study the mechanical and optical response of a thermoplastic polyurethane blended with 0.5wt.s% of bis(benzoxazolyl)stilbene dye. The mechanochromic behavior of the material is characterized in a uniaxial stress-relaxation test by simultaneously acquiring the applied force, mechanical deformation, and fluorescence emission. To offer insight into the stress-strain response of the polymer-dye blend, we adapt a classical nonlinear constitutive behavior for elastomeric materials that accounts for stress-induced softening. We correlate the fluorescent response with the mechanical strain to demonstrate the possibility of accurate strain sensing for a broad range of deformations during both loading and unloading.

Original languageEnglish (US)
Article number061907
JournalApplied Physics Letters
Volume105
Issue number6
DOIs
StatePublished - Aug 11 2014

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sensors
dyes
stilbene
unloading
stress relaxation
softening
fluorescence
polymers

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Mechanochromic polyurethane strain sensor. / Cellini, F.; Khapli, Sachin; Peterson, S. D.; Porfiri, Maurizio.

In: Applied Physics Letters, Vol. 105, No. 6, 061907, 11.08.2014.

Research output: Contribution to journalArticle

Cellini, F. ; Khapli, Sachin ; Peterson, S. D. ; Porfiri, Maurizio. / Mechanochromic polyurethane strain sensor. In: Applied Physics Letters. 2014 ; Vol. 105, No. 6.
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