| Preparation and Properties of Modified CG/Carbon Black/NBR Composites |
| Received:May 12, 2021 Revised:May 12, 2021 |
| DOI：10.12136/j.issn.1000-890X.2021.11.0832 |
| Key Words: CG；modification；LNBR；NBR；carbon black；composite；coating modification；dispersion degree |
| Author Name | Affiliation | E-mail | | TONG Xi* | Beijing Research and Design Institute of Rubber Industry Co.，Ltd | 330972596@qq.com | | WU Jiangtao | Beijing Research and Design Institute of Rubber Industry Co.，Ltd | | | GAO Jiahua | Beijing Research and Design Institute of Rubber Industry Co.，Ltd | |
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| Abstract: |
| Abstract：Cryptocrystalline graphite（CG） was modified by liquid nitrile butadiene rubber（LNBR），
and the vulcanization characteristics，physical properties，dynamic mechanical properties and filler dispersion
of modified CG/carbon black/nitrile rubber（NBR） composites were studied. The results showed that the
reactivity of CG was high due to its small particle size，rich sections，large amount of rough surfaces and
many structural defects. The tensile property and tear strength of the vulcanizates were improved by CG
and modified CG，and the physical properties of the vulcanizates were further improved with the increase
of the addition level of CG and modified CG. Compared with CG，modified CG had a better reinforcement
effect. This was because the LNBR coating modification made its surface hydrophobic，which enhanced the
interfacial interaction of the filler-rubber and improved the dispersion and wettability of the filler in the
rubber matrix. |
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