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4. A photopolymerizable thermoplastic with tunable mechanical performance

Author

Alim, Marvin D., primary, Childress, Kimberly K., additional, Baugh, Neil J., additional, Martinez, Alina M., additional, Davenport, Amelia, additional, Fairbanks, Benjamin D., additional, McBride, Matthew K., additional, Worrell, Brady T., additional, Stansbury, Jeffrey W., additional, McLeod, Robert R., additional, and Bowman, Christopher N., additional

Published
2020
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5. Enabling Applications of Covalent Adaptable Networks

Author

McBride, Matthew K., primary, Worrell, Brady T., additional, Brown, Tobin, additional, Cox, Lewis M., additional, Sowan, Nancy, additional, Wang, Chen, additional, Podgorski, Maciej, additional, Martinez, Alina M., additional, and Bowman, Christopher N., additional

Published
2019
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6. Reconfigurable and Spatially Programmable Chameleon Skin‐Like Material Utilizing Light Responsive Covalent Adaptable Cholesteric Liquid Crystal Elastomers.

Author

Martinez, Alina M., McBride, Matthew K., White, Timothy J., and Bowman, Christopher N.

Subjects
*ELASTOMERS, *CHOLESTERIC liquid crystals, *STRETCHING of materials, *VISIBLE spectra
Abstract

A mechanochromic, programmable, cholesteric liquid crystalline elastomer (CLCE) is fabricated, and after straining, resulting in a blue shift through the visible spectrum, is returned to its initial shape and color upon heating through its isotropic phase transition. Light initiated, radical‐mediated, addition fragmentation chain transfer (AFT), facilitate permanent programming or erasure of thermoreversible shape and color by relaxing stress imparted on the strained network through reversible bond exchange. Thermoreversible strain is coupled with reversible color change and can be made permanent at any desired strain by light exposure and corresponding AFT activation, temporarily restoring nearly initial shape and color upon heating. The optical characteristics and photonic structure, inherently linked to the network, are measured as a function of strain, to confirm the reflection notch narrowing indicating that prepolymerization alignment via shearing is poor thereby causing a broad spectrum of reflected light that narrows when the material is stretched. Beyond programming a new shape and color, the reflection notch is erased and separately, photopatterned to achieve dynamic color schemes that are toggled with heating and cooling, similar to that of a chameleon's camouflaging technique that has the ability to manipulate multiple colors in a single material, also with use for strain mapping. [ABSTRACT FROM AUTHOR]

Published
2020
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7. A readily programmable, fully reversible shape-switching material

Author

McBride, Matthew K., primary, Martinez, Alina M., additional, Cox, Lewis, additional, Alim, Marvin, additional, Childress, Kimberly, additional, Beiswinger, Michael, additional, Podgorski, Maciej, additional, Worrell, Brady T., additional, Killgore, Jason, additional, and Bowman, Christopher N., additional

Published
2018
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8. Reconfigurable LC Elastomers: Using a Thermally Programmable Monodomain To Access Two-Way Free-Standing Multiple Shape Memory Polymers

Author

Wen, Zhibin, primary, McBride, Matthew K., additional, Zhang, Xingpeng, additional, Han, Xun, additional, Martinez, Alina M., additional, Shao, Renfan, additional, Zhu, Chenhui, additional, Visvanathan, Rayshan, additional, Clark, Noel A., additional, Wang, Yuzhong, additional, Yang, Keke, additional, and Bowman, Christopher N., additional

Published
2018
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