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Facile synthesis of novel elastomers with tunable dynamics for toughness, self-healing and adhesion

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Title: Facile synthesis of novel elastomers with tunable dynamics for toughness, self-healing and adhesion
Authors: Chen, Liang Browse this author
Sun, Tao Lin Browse this author
Cui, Kunpeng Browse this author
King, Daniel R. Browse this author
Kurokawa, Takayuki Browse this author →KAKEN DB
Saruwatari, Yoshiyuki Browse this author
Gong, Jian Ping Browse this author →KAKEN DB
Keywords: Elastomers
Tough and self-healing
Relaxation time
Linear rheology
Issue Date: 7-Aug-2019
Publisher: Royal Society of Chemistry
Journal Title: Journal of materials chemistry A, Materials for energy and sustainability
Volume: 29
Start Page: 17334
End Page: 17344
Publisher DOI: 10.1039/C9TA04840E
Abstract: In this work, we develop a series of novel elastomers from acrylate monomers by one-step free radical copolymerization without using organic solvents. The dynamics of the elastomers, characterized by the Kuhn segment relaxation time τ0, is tuned over six orders of magnitude by varying the structure and composition of the acrylate monomers. Comprehensive studies on linear rheology at small deformation and tensile/fracture behaviors at large deformation of the materials are performed. A universal ductile–brittle transition of the elastomers with the criterion of [small epsi, Greek, dot above]τ0 ≂ 0.1 is observed for the diverse monomer pairs and stretch–strain rate [small epsi, Greek, dot above] and the elastomers exhibit maximum energy dissipation around the ductile–brittle transition reaching a work of extension at fracture of ∼25 MJ m−3 and a fracture energy of 20 kJ m−2. Such toughness is comparable to that of natural rubbers and is among the highest ever reported. In addition, these elastomers possess 100% self-recovery, and a relatively high self-healing efficiency (37–70%) of the cut samples at room temperature even for relatively rigid samples and strong adhesive strength on glass and polymethylmethacrylate (PMMA) substrates. The universal ductile–brittle transition of the materials means that we can use the linear rheology dynamics as fingerprints for predicting the dynamic spectra of toughness of the materials. The wide range of tunable dynamics substantially enriches the choice of elastomers for various applications, and the facile and solvent-free synthesis of these elastomers is eco-friendly, cost-effective and scalable, which greatly lowers the barrier for practical applications.
Type: article (author version)
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)
国際連携研究教育局 : GI-CoRE (Global Institution for Collaborative Research and Education : GI-CoRE) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 龔 剣萍 (Gong Jian Ping)

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