Mechanochemically Responsive Viscoelastic Elastomers
Mechanochemically responsive (MCR) polymers have been designed to possess unconventional properties such as changing colors, self-healing, and releasing catalysts under deformation. These properties of MCR polymers stem from a class of molecules, referred to as mechanophores, whose chemical reaction...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
ASME International
2017
|
| Online Access: | http://hdl.handle.net/1721.1/108340 https://orcid.org/0000-0003-4832-7523 https://orcid.org/0000-0001-7015-058X https://orcid.org/0000-0002-9060-227X https://orcid.org/0000-0001-5387-6186 |
| _version_ | 1826209366252978176 |
|---|---|
| author | Takaffoli, Mahdi Zhang, Teng Parks, David Moore Zhao, Xuanhe |
| author2 | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Takaffoli, Mahdi Zhang, Teng Parks, David Moore Zhao, Xuanhe |
| author_sort | Takaffoli, Mahdi |
| collection | MIT |
| description | Mechanochemically responsive (MCR) polymers have been designed to possess unconventional properties such as changing colors, self-healing, and releasing catalysts under deformation. These properties of MCR polymers stem from a class of molecules, referred to as mechanophores, whose chemical reactions can be controlled by mechanical forces. Although extensive studies have been devoted to the syntheses of MCR polymers by incorporating various mechanophores into polymer networks, the intricate interactions between mechanical forces and chemical reactions in MCR polymers across multiple length and time scales are still not well understood. In this paper, we focus on mechanochemical responses in viscoelastic elastomers and develop a theoretical model to characterize the coupling between viscoelasticity and chemical reactions of MCR elastomers. We show that the kinetics of viscoelasticity and mechanophore reactions introduce different time scales into the MCR elastomers. The model can consistently represent experimental data on both mechanical properties and chemical reactions of MCR viscoelastic elastomers. In particular, we explain recent experimental observations on the increasing chemical activation during stress relaxation of MCR elastomers, which cannot be explained with existing models. The proposed model provides a theoretical foundation for the design of future MCR polymers with desirable properties. |
| first_indexed | 2024-09-23T14:21:23Z |
| format | Article |
| id | mit-1721.1/108340 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:21:23Z |
| publishDate | 2017 |
| publisher | ASME International |
| record_format | dspace |
| spelling | mit-1721.1/1083402022-09-29T08:57:52Z Mechanochemically Responsive Viscoelastic Elastomers Takaffoli, Mahdi Zhang, Teng Parks, David Moore Zhao, Xuanhe Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Massachusetts Institute of Technology. Department of Mechanical Engineering Takaffoli, Mahdi Zhang, Teng Parks, David Moore Zhao, Xuanhe Mechanochemically responsive (MCR) polymers have been designed to possess unconventional properties such as changing colors, self-healing, and releasing catalysts under deformation. These properties of MCR polymers stem from a class of molecules, referred to as mechanophores, whose chemical reactions can be controlled by mechanical forces. Although extensive studies have been devoted to the syntheses of MCR polymers by incorporating various mechanophores into polymer networks, the intricate interactions between mechanical forces and chemical reactions in MCR polymers across multiple length and time scales are still not well understood. In this paper, we focus on mechanochemical responses in viscoelastic elastomers and develop a theoretical model to characterize the coupling between viscoelasticity and chemical reactions of MCR elastomers. We show that the kinetics of viscoelasticity and mechanophore reactions introduce different time scales into the MCR elastomers. The model can consistently represent experimental data on both mechanical properties and chemical reactions of MCR viscoelastic elastomers. In particular, we explain recent experimental observations on the increasing chemical activation during stress relaxation of MCR elastomers, which cannot be explained with existing models. The proposed model provides a theoretical foundation for the design of future MCR polymers with desirable properties. National Science Foundation (U.S.) (CMMI-1253495) 2017-04-21T15:26:47Z 2017-04-21T15:26:47Z 2016-05 2016-04 Article http://purl.org/eprint/type/JournalArticle 0021-8936 http://hdl.handle.net/1721.1/108340 Takaffoli, Mahdi; Zhang, Teng; Parks, David and Zhao, Xuanhe. “Mechanochemically Responsive Viscoelastic Elastomers.” Journal of Applied Mechanics 83, no. 7 (May 9, 2016): 071007. © 2016 ASME https://orcid.org/0000-0003-4832-7523 https://orcid.org/0000-0001-7015-058X https://orcid.org/0000-0002-9060-227X https://orcid.org/0000-0001-5387-6186 en_US http://dx.doi.org/10.1115/1.4033431 Journal of Applied Mechanics Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf ASME International American Society of Mechanical Engineers (ASME) |
| spellingShingle | Takaffoli, Mahdi Zhang, Teng Parks, David Moore Zhao, Xuanhe Mechanochemically Responsive Viscoelastic Elastomers |
| title | Mechanochemically Responsive Viscoelastic Elastomers |
| title_full | Mechanochemically Responsive Viscoelastic Elastomers |
| title_fullStr | Mechanochemically Responsive Viscoelastic Elastomers |
| title_full_unstemmed | Mechanochemically Responsive Viscoelastic Elastomers |
| title_short | Mechanochemically Responsive Viscoelastic Elastomers |
| title_sort | mechanochemically responsive viscoelastic elastomers |
| url | http://hdl.handle.net/1721.1/108340 https://orcid.org/0000-0003-4832-7523 https://orcid.org/0000-0001-7015-058X https://orcid.org/0000-0002-9060-227X https://orcid.org/0000-0001-5387-6186 |
| work_keys_str_mv | AT takaffolimahdi mechanochemicallyresponsiveviscoelasticelastomers AT zhangteng mechanochemicallyresponsiveviscoelasticelastomers AT parksdavidmoore mechanochemicallyresponsiveviscoelasticelastomers AT zhaoxuanhe mechanochemicallyresponsiveviscoelasticelastomers |