| Effect of 3，4-LIR on Damping Properties of NR/SBR Composites |
| Received:April 10, 2024 Revised:April 10, 2024 |
| DOI：10.12136/j.issn.1000-890X.2026.04.0265 |
| Key Words: 3，4-LIR；NR；SBR；composite；damping property |
| Author Name | Affiliation | E-mail | | HAO Xinling | Qingdao University of Science & Technology | 1280078101@qq.com | | FANG Yanchen | Qingdao University of Science & Technology | | | TANG Danning | Qingdao University of Science & Technology | | | LIU Yaonan | Qingdao University of Science & Technology | | | SUN Chong* | Qingdao University of Science & Technology | sunchongmc@qust.edu.cn |
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| Abstract: |
| The liquid 3，4-polyisoprene rubber（3，4-LIR） was prepared by anionic polymerization，the microstructure of the 3，4-LIR was characterized by nuclear magnetic resonance hydrogen spectroscopy and gel permeation chromatography，and the 3，4-LIR was incorporated into natural rubber（NR）/styrene-butadiene rubber（SBR） composites to investigate its effect on the damping properties of the composites.The results showed that the 3，4-structure content in the synthesized 3，4-LIR was 66.65%.As the 3，4-LIR dosage increased, the crosslinking density of the NR/SBR composite decreased，the damping properties were improved，while the physical properties were reduced.When 3，4-LIR dosage reached 20 phr，the effective damping temperature range of the composite expanded to －46.1 ℃ to 27.0 ℃，meeting the requirements for high-damping rubber products. |
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