| Effect of Silica Structure on Properties of Tread Compound |
| Received:February 07, 2021 Revised:February 07, 2021 |
| DOI：10.12136/j.issn.1000-890X.2022.07.0490 |
| Key Words: silica；tread compound；structure parameter；aggregation state；specific surface area；dispersion；mixing；dynamic mechanical property |
| Author Name | Affiliation | E-mail | | TANG Hanying* | Sinopec Beijing Research Institute of Chemical Industry Yanshan Branch | tanghy.bjhy@sinopec.com | | WANG Lili | Sinopec Beijing Research Institute of Chemical Industry Yanshan Branch | |
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| Abstract: |
| The effects of silicas with different structures on the properties of tread compound were studied from two aspects：aggregation state and specific surface area. The results exhibited that，for the silicas with the same aggregation state but different specific surface areas，the larger the specific surface area of the silica was，the higher the mixing temperature rise of the filled compound was，the greater the mixing power was，and the greater the processing difficulty was. With the increase of specific surface area and the decrease of primary particle size of the silicas，the aggregates of the silica increased，and the dispersion decreased. For the silicas with the same specific surface area but different aggregation states，for example，the silica having a specific surface area of 200 m２·g-1，the dispersion of fumed silica A200 in rubber matrix was better than that of precipitated silica 200MP，while precipitated silica 200GR had the worst dispersion. Compared with precipitated silica 200MP and 200GR，fumed silica A200 could simultaneously reinforce and toughen the vulcanizate，and reduce the rolling resistance and abrasion loss of the vulcanizate，but the wet-skid resistance of the vulcanizate was poor. |
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