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Title: Combined light- and heat-induced shape memory behavior of anthracene-based epoxy elastomers

Abstract

AbstractThe development of multi-stimuli-responsive shape memory polymers has received increasing attention because of its scientific and technological significance. In this work, epoxy elastomers with reversible crosslinks are synthesized by polymerizing an anthracene-functionalized epoxy monomer, a diepoxy comonomer, and a dicarboxylic acid curing agent. The synthesized elastomers exhibit active responses to both light and heat enabled by the incorporated anthracene groups. When exposed to 365 nm UV light, additional crosslinking points are created by the photo-induced dimerization of pendant anthracene groups. The formation of the crosslinking points increases modulus and glass transition temperature of the elastomers, allowing for the fixation of a temporary shape at room temperature. The temporary shape remains stable until an external heat stimulus is applied to trigger the scission of the dimerized anthracene, which reduces the modulus and glass transition temperature and allows the elastomers to recover their original shapes. The effects of external stimuli on the thermal and dynamic mechanical properties of the elastomers are investigated experimentally and are correlated with molecular dynamics simulations that reveal the changes of structure and dynamics of the anthracene molecules and flexible chains.

Authors:
; ; ; ; ; ORCiD logo; ORCiD logo;
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office; US Air Force Office of Scientific Research (AFOSR); Chinese Scholarship Council
OSTI Identifier:
1720189
Alternate Identifier(s):
OSTI ID: 1731069
Grant/Contract Number:  
AC05-00OR22725; FA-9550-12-1-0108; 201506600009
Resource Type:
Published Article
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Name: Scientific Reports Journal Volume: 10 Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United Kingdom
Language:
English
Subject:
36 MATERIALS SCIENCE; coarse-grained models; polymers

Citation Formats

Li, Yuzhan, Goswami, Monojoy, Zhang, Yuehong, Liu, Tuan, Zhang, Jinwen, Kessler, Michael R., Wang, Liwei, and Rios, Orlando. Combined light- and heat-induced shape memory behavior of anthracene-based epoxy elastomers. United Kingdom: N. p., 2020. Web. https://doi.org/10.1038/s41598-020-77246-0.
Li, Yuzhan, Goswami, Monojoy, Zhang, Yuehong, Liu, Tuan, Zhang, Jinwen, Kessler, Michael R., Wang, Liwei, & Rios, Orlando. Combined light- and heat-induced shape memory behavior of anthracene-based epoxy elastomers. United Kingdom. https://doi.org/10.1038/s41598-020-77246-0
Li, Yuzhan, Goswami, Monojoy, Zhang, Yuehong, Liu, Tuan, Zhang, Jinwen, Kessler, Michael R., Wang, Liwei, and Rios, Orlando. Thu . "Combined light- and heat-induced shape memory behavior of anthracene-based epoxy elastomers". United Kingdom. https://doi.org/10.1038/s41598-020-77246-0.
@article{osti_1720189,
title = {Combined light- and heat-induced shape memory behavior of anthracene-based epoxy elastomers},
author = {Li, Yuzhan and Goswami, Monojoy and Zhang, Yuehong and Liu, Tuan and Zhang, Jinwen and Kessler, Michael R. and Wang, Liwei and Rios, Orlando},
abstractNote = {AbstractThe development of multi-stimuli-responsive shape memory polymers has received increasing attention because of its scientific and technological significance. In this work, epoxy elastomers with reversible crosslinks are synthesized by polymerizing an anthracene-functionalized epoxy monomer, a diepoxy comonomer, and a dicarboxylic acid curing agent. The synthesized elastomers exhibit active responses to both light and heat enabled by the incorporated anthracene groups. When exposed to 365 nm UV light, additional crosslinking points are created by the photo-induced dimerization of pendant anthracene groups. The formation of the crosslinking points increases modulus and glass transition temperature of the elastomers, allowing for the fixation of a temporary shape at room temperature. The temporary shape remains stable until an external heat stimulus is applied to trigger the scission of the dimerized anthracene, which reduces the modulus and glass transition temperature and allows the elastomers to recover their original shapes. The effects of external stimuli on the thermal and dynamic mechanical properties of the elastomers are investigated experimentally and are correlated with molecular dynamics simulations that reveal the changes of structure and dynamics of the anthracene molecules and flexible chains.},
doi = {10.1038/s41598-020-77246-0},
journal = {Scientific Reports},
number = 1,
volume = 10,
place = {United Kingdom},
year = {2020},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
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https://doi.org/10.1038/s41598-020-77246-0

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