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

Li, Yuzhan; Goswami, Monojoy; Zhang, Yuehong; Liu, Tuan; Zhang, Jinwen; Kessler, Michael R.; Wang, Liwei; Rios, Orlando

doi:10.1038/s41598-020-77246-0

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

Journal Article · Wed Nov 18 23:00:00 EST 2020 · Scientific Reports

DOI:https://doi.org/10.1038/s41598-020-77246-0· OSTI ID:1720189

Li, Yuzhan; Goswami, Monojoy; Zhang, Yuehong; Liu, Tuan; Zhang, Jinwen; ; ; Rios, Orlando

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.

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Sponsoring Organization:: 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

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1720189

Alternate ID(s):: OSTI ID: 1731069

Journal Information:: Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 10; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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