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Healable, Reconfigurable, Reprocessable Thermoset Shape Memory Polymer with Highly Tunable Topological Rearrangement Kinetics
journal contribution
posted on 2017-06-20, 00:00 authored by Zizheng Fang, Ning Zheng, Qian Zhao, Tao XieThe unique capability of topological
rearrangement for dynamic
covalent polymer networks has enabled various unusual properties (self-healing,
solid-state plasticity, and reprocessability) that are not found in
conventional thermosets. Achieving these properties in one network
in a synergetic fashion can open up new opportunities for shape memory
polymer. To accomplish such a goal, the freedom to tune topological
rearrangement kinetics is critical. This is, however, challenging
to achieve. In this work, two sets of dynamic bonds (urethane and
hindered urea) are incorporated into a hybrid network for synthesizing
shape memory poly(urea-urethane). By changing the bond ratio, networks
with highly tunable topological rearrangement kinetics are obtained.
Combining self-healing, solid-state plasticity, and reprocessability
in one such shape memory network leads to unusual versatility in its
shape-shifting performance.
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topological rearrangementTunable Topological Rearrangement Kineticsplasticitytune topological rearrangement kineticssynergetic fashionbond ratioreprocessabilityself-healingshape memory networkshape memory polymercovalent polymer networkstunable topological rearrangement kineticsshape-shifting performanceReprocessable Thermoset Shape Memory Polymer
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