Citation: Zhi-Fei Zhang, Kun Yang, Shu-Gao Zhao, Lai-Na Guo. Self-healing Behavior of Ethylene Propylene Diene Rubbers Based on Ionic Association[J]. Chinese Journal of Polymer Science, ;2019, 37(7): 700-707. doi: 10.1007/s10118-019-2241-0 shu

Self-healing Behavior of Ethylene Propylene Diene Rubbers Based on Ionic Association

Zhi-Fei Zhang ^a ,
Kun Yang ^a,b,, ,
Shu-Gao Zhao ^a,, ,
Lai-Na Guo ^c

a.
Key Laboratory of Rubber-plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao 266042, China
b.
College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, Tianjin 300457, China
c.
Hutchinson, research center, Rue Gustave Nourry, Chalette sur Loing, 45120, France

Corresponding author: Kun Yang, yangkun1463@126.com Shu-Gao Zhao, zhaosgqd@hotmail.com
Received Date: 25 December 2018
Revised Date: 19 February 2019
Accepted Date: 1 January 2018
Available Online: 4 April 2019

To meet the increasing demand for safe, environmentally friendly and high-performance smart materials, self-healing rubbers are highly desired. Here, the self-healing performance of ethylene propylene diene monomer rubber (EPDM) is reported, which was designed by graft-polymerization of zinc dimethacrylate (ZDMA) onto rubber chains to form a reversible ionic cross-linked network. Single ionic cross-linked network and dual network, combining covalent and ionic cross-links, could be tuned by controlling vulcanization process to achieve tailorable mechanical and self-healing properties. It was found that ionic cross-linked EPDM showed a recovery of more than 95% of the original mechanical strength through a healing process of 1 h at 100 °C. The covalent cross-links could improve mechanical properties but block self-healing. Adding 50 wt% liquid rubber to “dry” EPDM could effectively enhance self-healing capability of the dual cross-linked network and the healed tensile strength could reach 0.9 MPa. A compromise between mechanical performance and healing capability could be potentially tailored by controlling vulcanization process and liquid rubber content.
- Ionic bond,
- Self-healing,
- Ethylene propylene diene rubber,
- Dual-network
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