| Effect of Bis（2-citronimidophenyl） Disulfide on Properties of NR |
| Received:August 17, 2022 Revised:August 17, 2022 |
| DOI：10.12136/j.issn.1000-890X.2024.01.0003 |
| Key Words: NR；BCoPD；plasticization；polysulfide bond；anti-reversion property |
| Author Name | Affiliation | E-mail | | HE Mingbin | South China University of Technology | hemingbin1998@163.com | | ZOU Lijing | South China University of Technology | | | CHEN Zhaohui* | South China University of Technology | pszhchen@scut.edu.cn | | HUANG Xuezhi | South China University of Technology | | | WU Zaisheng | Jiangsu Rebo New Material Technology Co.，Ltd | | | LIN Qiang | Jiangsu Rebo New Material Technology Co. ，Ltd | |
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| Abstract: |
| Bis（2-citraconimidophenyl） disulfide（BCoPD）/natural rubber（NR） composites were
prepared by mechanical blending using BCoPD as a multifunctional vulcanizing agent，and the effects of
BCoPD amounts and composite preparation methods on the Mooney viscosities，Payne effects，vulcanization
characteristics，crosslinking bond distributions，physical properties and dynamic mechanical properties of
BCoPD/NR composites were investigated. The results showed that when the BCoPD/NR composite was
prepared by adding BCoPD during the plasticization process of raw rubber，adding 0. 5 phr BCoPD resulted
in a 22. 2% decrease in Mooney viscosity of the composite，a 3% decrease in anti-reversion rate at 60
minutes，a 3% increase in the polysulfide bond proportion，a slight decrease in physical properties and a slight
improvement in wet slip resistance. When the BCoPD/NR composite preparation method by adding BCoPD
during adding the curing system was adopted，adding 1 phr BCoPD reduced the anti-reversion rate of the
composite at 60 minutes by 11. 9%，increased the polysulfide bond proportion by 5%，improved the properties
and slightly decreased the rolling resistance. |
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