| Study on Segregation Behavior of Sulfur in NR/SBR Blends |
| Received:December 26, 2019 Revised:December 26, 2019 |
| DOI：10.12136/j.issn.1000-890X.2020.11.0827 |
| Key Words: sulfur；segregation；NR；SBR；blend；crosslinking density；reinforcement |
| Author Name | Affiliation | E-mail | | HAN Tinghui | Qingdao University of Science and Technology | 2669513821@qq.com | | LIU Hongxu | Qingdao University of Science and Technology | | | CHU Qing | Qingdao University of Science and Technology | | | SUN Chong | Qingdao University of Science and Technology | | | ZHUANG Tao* | Qingdao University of Science and Technology | zhuangtao@qust.edu.cn |
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| Abstract: |
| Natural rubber （NR）/styrene-butadiene rubber（SBR） blends with common sulfur curing system were prepared，and the segregation behavior of sulfur in the NR/SBR blends was studied. The results showed that，sulfur segregated in the SBR phase，and there might be co-crosslinking at the interface between NR and SBR. The ｔ10 and ｔ90 of the NR/SBR blends was shortened with the increase of the NR/SBR blending ratio. When the amount of sulfur was 2. 25 phr，the crosslinking density and hardness of the NR/SBR blends increased with the increase of the NR/SBR blending ratio. When the amount of sulfur was 3. 25 phr，the over-vulcanized SBR phase acted as the reinforcement microspheres in the NR matrix. |
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