Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 129, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2019.105709
Keywords
Elastomer; Thermorevesible bonding; Reprocessability; Self-healing behavior
Funding
- 973 Program [2015CB654700 (2015654703)]
- National Natural Science Foundation of China [51573051, 51703063]
- Scientific and Technological Research Program of Chongqing Municipal Education Commission [KJQN201900517]
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Commercial ethylene propylene diene monomer (EPDM) rubber grafted with maleic anhydride (EPDM-g-MA) was thermoreversibly crosslinked by silane modified silica. EPDM-g-MA was first modified with furfurylamine to obtain furan functionalized EPDM (EPDM-g-FA) which was then crosslinked with 3-methacryloxypropyl-trimethoxysilane (as electron-poor agent) modified silica via a Diels-Alder reaction. The as-formed rubber network could be broken at high temperature and reconstructed by thermal annealing, which were proven by differential scanning calorimetric analysis and solubility testing. The mechanical strength of the resulting EPDM/silica composites could be tailored by the amount of modified silica and were superior to the previously reported EPDM rubber crosslinked by low molecular organic agents. More importantly, the rubber composites showed good thermal reprocessability and self-healing behavior, by which the crosslinked composites could be recycled to use with comparable mechanical property as the original composites.
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