|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Life Science / Faculty of Advanced Life Science >
Peer-reviewed Journal Articles, etc >
Crack Tip Field of a Double-Network Gel: Visualization of Covalent Bond Scission through Mechanoradical Polymerization
| Title: | Crack Tip Field of a Double-Network Gel: Visualization of Covalent Bond Scission through Mechanoradical Polymerization |
| Authors: | Matsuda, Takahiro Browse this author | | Kawakami, Runa Browse this author | | Nakajima, Tasuku Browse this author →KAKEN DB | | Gong, Jian Ping Browse this author →KAKEN DB |
| Issue Date: | 2020 |
| Publisher: | American Chemical Society(ACS) |
| Journal Title: | Macromolecules |
| Volume: | 53 |
| Issue: | 20 |
| Start Page: | 8787 |
| End Page: | 8795 |
| Publisher DOI: | 10.1021/acs.macromol.0c01485 |
| Abstract: | Quantitative characterization of the energy dissipation zone around a crack tip is the focal point in the fracture mechanics of soft materials. In this report, we present a mechanochemical technique for the visualization and quantification of the degree of polymer strand scission in the damage zone of tough double-network hydrogels. This technique uses mechanoradicals generated by covalent bond scission to initiate radical polymerization, which records the internal fracturing around the crack tip during crack opening or propagation. We adopted the mechanoradical polymerization of N-isopropylacrylamide, which forms a thermoresponsive polymer and whose distribution was visualized using an environment-responsive fluorescent probe. Twoand three-dimensional damage distributions were captured using a laser scanning confocal microscope. This technique also allowed for the quantitative estimation of the spatial distribution of stress, strain, and energy dissipation around the crack tip. The advantages and limitations of this technique are also discussed. |
| Rights: | This document is the Accepted Manuscript version of a Published Work that appeared in final form in Macromolecules, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://dx.doi.org/10.1021/acs.macromol.Oc01485. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/82839 |
| Appears in Collections: | 生命科学院・先端生命科学研究院 (Graduate School of Life Science / Faculty of Advanced Life Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 龔 剣萍 (Gong Jian Ping)
|
