| Study on properties of halogen-free and flame retardant NR compound |
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| DOI： |
| Key Words: NR；magnesium hydroxide；red phosphorus；nano-kaolin；flame retardance |
| Author Name | Affiliation | | HE Chun-jiang | China Academy of Railway Sciences | | DANG Jia | China Academy of Railway Sciences | | YANG Wei-jian | China Academy of Railway Sciences | | LI Xue-chun | China Academy of Railway Sciences | | CHEN Chuan-zhi | China Academy of Railway Sciences | | ZHANG Xian-qing | China Academy of Railway Sciences |
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| Abstract: |
| The influence of magnesium hydroxide，magnesium hydroxide/red phosphorus blend and magnesium hydroxide/red phosphorus/nano-kaolin blend on the physical properties and flame retardance of NR compound was investigated.The results showed that compared to magnesium hydroxide alone，when magnesium hydroxide/red phosphorus blend was used，the oxygen index was increased effectively，the smoke density was decreased and the physical properties were improved.When magnesium hydroxide/red phosphorus/nano-kaolin blend was used，the oxygen index was further increased，the smoke density was increased slightly comparing with magnesium hydroxide/red phosphorus blend，whereas，the smoke density was decreased significantly as compared to magnesium hydroxide alone，and the physical properties were further improved.It was found that excellent comprehensive properties of NR vulcanizate could be obtained when 92 phr magnesium hydroxide，8 phr red phosphorus and 20 phr nano-kaolin were used. |
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