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Light-stimulated Permanent Shape Reconfiguration in Crosslinked Polymer Microparticles



Lewis M. Cox, Xiaohao Sun, Chen Wang, Nancy Sowan, Jason Killgore, Rong Long, Hengan Wu, Christopher N. Bowman, Yifu Ding


Covalent adaptable networks (CANs) are cross-linked polymer networks capable reconfiguring their network topology, enabling stress relaxation and shape changing behaviors. Reversible addition-fragmentation chain transfer (RAFT) is one specific mechanism by covalent bonds may be broken and reformed in a polymer network and has demonstrated the ability to generate sub- micron surface patterns on bulk CAN films. While stress relaxation behavior has been studied in bulk materials and film surfaces, here we characterize the ability of RAFT-based CAN microspheres to deform and fix non-spherical geometries. We provide the first demonstration of rubbery microspheres exhibiting a permanent change in their overall shape as well as their surface topography.
Advanced Materials


Smart Particles, Shape Reconfiguration, Covalent Adaptive Network, Photoplasticity


Cox, L. , Sun, X. , Wang, C. , Sowan, N. , Killgore, J. , Long, R. , Wu, H. , Bowman, C. and Ding, Y. (2017), Light-stimulated Permanent Shape Reconfiguration in Crosslinked Polymer Microparticles, Advanced Materials (Accessed June 14, 2024)


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Created April 6, 2017, Updated October 12, 2021