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Article

On the Size Effect of Additives in Amorphous Shape Memory Polymers

1
Interdisciplinary Centre for Advanced Materials Simulation (ICAMS), Ruhr-Universität Bochum, Universitätsstr. 150, 44801 Bochum, Germany
2
Institute for Materials (IFM), Ruhr-Universität Bochum, Universitätsstr. 150, 44801 Bochum, Germany
*
Author to whom correspondence should be addressed.
Materials 2021, 14(2), 327; https://doi.org/10.3390/ma14020327
Received: 13 December 2020 / Revised: 30 December 2020 / Accepted: 6 January 2021 / Published: 10 January 2021
Small additive molecules often enhance structural relaxation in polymers. We explore this effect in a thermoplastic shape memory polymer via molecular dynamics simulations. The additive-to-monomer size ratio is shown to play a key role here. While the effect of additive-concentration on the rate of shape recovery is found to be monotonic in the investigated range, a non-monotonic dependence on the size-ratio emerges at temperatures close to the glass transition. This work thus identifies the additives’ size to be a qualitatively novel parameter for controlling the recovery process in polymer-based shape memory materials. View Full-Text
Keywords: shape memory polymers; size effect of additives; molecular dynamics simulations shape memory polymers; size effect of additives; molecular dynamics simulations
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MDPI and ACS Style

Zirdehi, E.M.; Dumlu, H.; Eggeler, G.; Varnik, F. On the Size Effect of Additives in Amorphous Shape Memory Polymers. Materials 2021, 14, 327. https://doi.org/10.3390/ma14020327

AMA Style

Zirdehi EM, Dumlu H, Eggeler G, Varnik F. On the Size Effect of Additives in Amorphous Shape Memory Polymers. Materials. 2021; 14(2):327. https://doi.org/10.3390/ma14020327

Chicago/Turabian Style

Zirdehi, Elias M., Hakan Dumlu, Gunther Eggeler, and Fathollah Varnik. 2021. "On the Size Effect of Additives in Amorphous Shape Memory Polymers" Materials 14, no. 2: 327. https://doi.org/10.3390/ma14020327

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