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Pressure‐Sensitive Chromogenic Polyesters
Author(s) -
Kunzelman Jill,
Gupta Mohit,
Crenshaw Brent R.,
Schiraldi David A.,
Weder Christoph
Publication year - 2009
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200800299
Subject(s) - materials science , polyester , amorphous solid , polymer , chromogenic , annealing (glass) , covalent bond , copolymer , molecule , polymer chemistry , composite material , chemical engineering , organic chemistry , chromatography , chemistry , engineering
Cyano‐OPV moieties were covalently incorporated into a PETG backbone to create ductile amorphous polymers which change their PL and absorption color as a function of deformation. The cyano‐OPV concentration was systematically varied, and the composition was related to the material's optical response. This approach afforded PETG/dye copolymers which upon annealing display characteristics of aggregated dye molecules. The materials exhibit a significant color change upon compression, consistent with disassembly of the dye aggregates. This mechanochromic response is irreversible and can be detected by the unassisted eye.