| Role of Carbon Black in Pitch-Based Short Carbon Fiber Reinforced NR |
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| DOI： |
| Key Words: NR；pitch-based short carbon fiber；carbon black；ozone modification；mechanical property |
| Author Name | Affiliation | | CHENG Junmei | Qingdao University of Science and Technology | | ZHAO Shugao | 青岛科技大学 橡塑材料与工程教育部重点实验室 |
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| Abstract: |
| The effect of carbon black（CB） and ozone modified pitch-based short carbon fiber（CF） on the physical properties of NR/CF composites was studied.The results showed that，the coating layer of CF was almost cleaned by ozone modification，and the surface of CF became rougher.CF was pulled out smoothly from NR matrix，which indicated poor physical properties of NR/CF vulcanizate.By adding 30 phr CB N330，the physical properties of NR/CF vulcanizate were improved significantly，and the tensile strength of NR/CB/CF and NR/CB/modified CF vulcanizates were 18.6 and 26.9 MPa respectively，which were 431% and 627% increase compared with NR/CF and NR/modified CF vulcanizates respectively.CF and CB had similar microstructure，and thus CB acted as bridge between CF and NR，leading to better interface strength of NR and CF. |
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