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

作　　者：Zhi-Fei Zhang Kun Yang Shu-Gao Zhao Lai-Na Guo 

机构地区：[1]Key Laboratory of Rubber-plastics,Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics,Qingdao University of Science & Technology,Qingdao 266042,China [2]College of Chemical Engineering and Materials Science,Tianjin University of Science & Technology,Tianjin 300457,China [3]Hutchinson,research center,Rue Gustave Nourry,Chalette sur Loing,45120,France

出　　处：《Chinese Journal of Polymer Science》2019年第7期700-707,共8页高分子科学（英文版）

基　　金：financially supported by the National Basic Research Program of China (Nos. 2015CB654700 and 2015CB654706);the National Natural Science Foundation of China (No. 51403115);the Key Laboratory of Rubber-Plastics, Ministry of Education/ Shandong Provincial Key Laboratory of Rubber-plastics of Qingdao University of Science & Technology (KF2017008)

摘　　要：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.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.

关 键 词：Ionic bond SELF-HEALING ETHYLENE PROPYLENE DIENE rubber DUAL-NETWORK 

分 类 号：O6[理学—化学]