Two-Way Shape Memory Polymers: Evolution of Stress vs Evolution of Elongation
- Andrés Posada MurciaAndrés Posada MurciaFaculty of Engineering Sciences and Bavarian Polymer Institute, University of Bayreuth, Ludwig Thoma Str. 36A, 95447 Bayreuth, GermanyMore by Andrés Posada Murcia,
- Juan Manuel Uribe GomezJuan Manuel Uribe GomezFaculty of Engineering Sciences and Bavarian Polymer Institute, University of Bayreuth, Ludwig Thoma Str. 36A, 95447 Bayreuth, GermanyMore by Juan Manuel Uribe Gomez,
- Jens-Uwe SommerJens-Uwe SommerLeibniz Institute of Polymer Research Dresden e.V., Hohe Straße 6, 01069 Dresden, GermanyFaculty of Physics, TU Dresden, 01069 Dresden, GermanyCluster of Excellence Physics of Life, TU Dresden, 01069 Dresden, GermanyMore by Jens-Uwe Sommer, and
- Leonid Ionov*
Stimuli-responsive polymers are a subject of numerous studies in recent decades due to its variety of possible applications ranging from nanomedicine, drug delivery systems, biosensing, to smart textile development and aerospace engineering. The current demand of reliable and easy-programmable polymeric-actuating components underlines the necessity to understand the mechanism that governs the actuation of materials. This work sheds new light on the understanding of the two-way shape memory effect (2W-SME) of cross-linked semicrystalline polymers. We investigated and compared melting/crystallization of cross-linked polycaprolactone under constant stress and constraint strain conditions. We observed three regions of behavior upon cooling: rubbery, semicrystalline, and an intermediate one associated with entropic softening of the network prior to crystallization. Based on obtained observations, we proposed possible mechanisms for the processes occurring in cross-linked polymers upon their crystallization/melting and quantitatively investigated the effects of applied stress, elongation, and cross-linking density to allow programmable design of reversible actuators.
This article is cited by 3 publications.
- Youlei Tu, Yu Zheng, Shaoyun Guo, Jiabin Shen. Switchable Piezoelectricity of Polyvinylidene Fluoride Films Induced by Crystal Transition in Shape Memory Process. ACS Applied Materials & Interfaces 2022, 14 (35) , 40331-40343. https://doi.org/10.1021/acsami.2c11152
- Jin Wang, Zhikai Tu, Huanhuan Zhang, Meng-Meng Wang, Weifeng Liu, Jin-Ping Qu. Actuation Mechanisms of a Semicrystalline Elastomer-Based Polymer Artificial Muscle with High Actuation Strain. Macromolecules 2022, 55 (10) , 3986-3999. https://doi.org/10.1021/acs.macromol.2c00549
- Andrés Posada-Murcia, Juan Manuel Uribe-Gomez, Stephan Förster, Jens-Uwe Sommer, Martin Dulle, Leonid Ionov. Mechanism of Behavior of Two-Way Shape Memory Polymer under Constant Strain Conditions. Macromolecules 2022, 55 (5) , 1680-1689. https://doi.org/10.1021/acs.macromol.1c02564