Advancing reversible shape memory by tuning the polymer network architecture

Li, Qiaoxi; Zhou, Jing; Vatankhah-Varnoosfaderani, Mohammad; Nykypanchuk, Dmytro; Gang, Oleg; Sheiko, Sergei S.

doi:10.1021/acs.macromol.5b02740

Advancing reversible shape memory by tuning the polymer network architecture

Journal Article · Tue Feb 02 00:00:00 EST 2016 · Macromolecules

DOI:https://doi.org/10.1021/acs.macromol.5b02740· OSTI ID:1328375

Li, Qiaoxi ^[1]; Zhou, Jing ^[1]; Vatankhah-Varnoosfaderani, Mohammad ^[1]; Nykypanchuk, Dmytro ^[2]; Gang, Oleg ^[2]; Sheiko, Sergei S. ^[1]

Univ. of North Carolina, Chapel Hill, NC (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)

Because of counteraction of a chemical network and a crystalline scaffold, semicrystalline polymer networks exhibit a peculiar behavior—reversible shape memory (RSM), which occurs naturally without applying any external force and particular structural design. There are three RSM properties: (i) range of reversible strain, (ii) rate of strain recovery, and (iii) decay of reversibility with time, which can be improved by tuning the architecture of the polymer network. Different types of poly(octylene adipate) networks were synthesized, allowing for control of cross-link density and network topology, including randomly cross-linked network by free-radical polymerization, thiol–ene clicked network with enhanced mesh uniformity, and loose network with deliberately incorporated dangling chains. It is shown that the RSM properties are controlled by average cross-link density and crystal size, whereas topology of a network greatly affects its extensibility. In conclusion, we have achieved 80% maximum reversible range, 15% minimal decrease in reversibility, and fast strain recovery rate up to 0.05 K^–1, i.e., ca. 5% per 10 s at a cooling rate of 5 K/min.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

OSTI ID:: 1328375

Report Number(s):: BNL--112682-2016-JA; KC0403020

Journal Information:: Macromolecules, Journal Name: Macromolecules Journal Issue: 4 Vol. 49; ISSN 0024-9297

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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An Optical Actuator Based on Gold-Nanoparticle-Containing Temperature-Memory Semicrystalline Polymers Ge, Feijie; Lu, Xili; Xiang, Jun Angewandte Chemie, Vol. 129, Issue 22 https://doi.org/10.1002/ange.201612164	journal	March 2017
An Optical Actuator Based on Gold-Nanoparticle-Containing Temperature-Memory Semicrystalline Polymers Ge, Feijie; Lu, Xili; Xiang, Jun Angewandte Chemie International Edition, Vol. 56, Issue 22 https://doi.org/10.1002/anie.201612164	journal	March 2017
Dynamic reversible bonds enable external stress-free two-way shape memory effect of a polymer network and the interrelated intrinsic self-healability of wider crack and recyclability Fan, Long Fei; Rong, Min Zhi; Zhang, Ming Qiu Journal of Materials Chemistry A, Vol. 6, Issue 33 https://doi.org/10.1039/c8ta05751f	journal	January 2018
Design of ethylene-vinyl acetate copolymer fiber with two-way shape memory effect Qi, Xiaoming; Yang, Wentong; Yu, Laiming Polymers https://doi.org/10.20944/preprints201909.0207.v1	journal	September 2019

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