Triethoxysilyl-Terminated Telechelic Liquid Butadiene Rubber with Disulfide Linkages for Tire Tread of Electric Vehicles
- Authors
- Choi, Haeun; Song, Sanghoon; Yeom, Gyeongdong; Kim, Donghyuk; Kim, Seongyoon; Jeong, Junhwan; Hwang, Kiwon; Joo, Sang-Woo; Chung, Sungwook; Kim, Wonho; Paik, Hyun-jong
- Issue Date
- Feb-2024
- Publisher
- AMER CHEMICAL SOC
- Keywords
- free-radical telomerization; triethoxysilyl-terminatedpolymer; liquid butadiene rubber; additional cross-linking; silica-filled compound; EV tire tread
- Citation
- ACS APPLIED POLYMER MATERIALS, v.6, no.4, pp 2076 - 2084
- Pages
- 9
- Journal Title
- ACS APPLIED POLYMER MATERIALS
- Volume
- 6
- Number
- 4
- Start Page
- 2076
- End Page
- 2084
- URI
- https://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/49242
- DOI
- 10.1021/acsapm.3c02037
- ISSN
- 2637-6105
- Abstract
- The increasing global adoption of electric vehicles (EVs) has shifted the focus of tire research toward enhancing fuel efficiency and abrasion resistance. In this study, we propose triethoxysilyl-terminated telechelic liquid butadiene rubber with disulfide linkages (Si69-LBR) as a processing aid in the tire tread compound to enhance tire performance. The triethoxysilyl groups at both ends of Si69-LBR form covalent bonds with silanol groups on the silica surface, and the disulfide linkages in Si69-LBR additionally cross-link with the base rubber. Si69-LBR was synthesized via a "one-step" process using Si69, containing bis[3-(triethoxysilyl)propyl]tetrasulfide, as an iniferter (initiator & horbar;transfer agent & horbar;terminator). Compared to the compound applied with 40 phr processing oil, the compound in which 10 phr was replaced with Si69-LBR exhibited enhanced migration resistance, abrasion resistance, and fuel efficiency of 21, 20, and 7%, respectively. These results explain the effect of the functionalization of LBR and the additional cross-linking resulting from sulfide bonds in Si69-LBR.
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