| Study on Factors Affecting Loss Factor of SBR Compound |
| Received:September 12, 2019 Revised:September 12, 2019 |
| DOI：10.12136/j.issn.1000-890X.2020.05.0330 |
| Key Words: SBR；loss factor；silica；coupling agent Si69；plasticizer；curing system；binder |
| Author Name | Affiliation | E-mail | | ZHANG Weijie | Beijing University of Chemical Technology | 1171857214@qq.com | | ZOU Hua* | Beijing University of Chemical Technology | zouhua@mail.buct.edu.cn | | LIU Na | Beijing University of Chemical Technology | |
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| Abstract: |
| Using rubber processing analyzer RPA2000，the effects of the amount of coupling agent Si69，the amount of silica，the type of plasticizer，curing system and binder RH on the loss factor（tanδ）of SBR compound were studied. The results showed that，addition of coupling agent Si69 could reduce the tanδ of the rubber compound，and the optimum amount of coupling agent was 10% of the amount of silica.When the amount of silica was within 40 phr and the strain was less than 1%，tanδ of the rubber compound decreased with the increase of the amount of silica. But when the strain was over 1%，the tanδ increased with the increase of silica amount. When the amount of silica was more than 40 phr，tanδ of the rubber compound increased sharply. The tanδ increased with use of plasticizers，and it was smaller with paraffin oil than that with white ointment or coumarone-indene resin. With the increase of the amount of sulfur，tanδ of the rubber compound cured with sulfur curing system alone decreased first and then increased，and it reached the minimum value when the amount of sulfur was 2 phr. The tanδ of the rubber compound with sulfur and peroxide combined curing system was smaller than that with sulfur alone，and it decreased with the increase of the amount of DPBMH. Addition of binder RH could reduce tanδ of the rubber compound. |
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