| 碱式碳酸镁阻燃天然橡胶复合材料的 制备与性能研究 |
| Preparation and Properties of Flame Retardant NR Composites with Basic Magnesium Carbonate |
| 投稿时间：2021-01-04 修订日期：2021-01-04 |
| DOI：10.12136/j.issn.1000-890X.2022.05.0347 |
| 中文关键词: 碱式碳酸镁 天然橡胶 复合材料 硫化特性 物理性能 阻燃性能 |
| 英文关键词: basic magnesium carbonate NR composite vulcanization characteristics physical property flame retardancy |
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| 中文摘要: |
| 在天然橡胶（NR）中添加碱式碳酸镁以制备阻燃橡胶复合材料，研究碱式碳酸镁对NR复合材料性能的影响。结果表明：随着碱式碳酸镁用量的增大，NR胶料的硫化转矩增大，焦烧时间缩短，硫化胶的300%定伸应力和撕裂强度先增大后减小，氧指数逐渐增大，阻燃性能提高；碱式碳酸镁的分解温度范围较宽，其填充NR硫化胶的残炭较密集，且均匀地覆盖在硫化胶表面。 |
| 英文摘要: |
| The flame retardant rubber composites were prepared by adding basic magnesium carbonate to natural rubber（NR），and the effect of basic magnesium carbonate on the properties of NR composites was studied. The results showed that with the increase of the amount of basic magnesium carbonate，the vulcanization torque of the NR compound increased，the scorch time was shortened，the tensile stress at 300% elongation and tear strength of the vulcanizate increased at first and then decreased，the oxygen index gradually increased，and the flame retardancy was improved. The decomposition temperature range of basic magnesium carbonate was wide，and the residual carbon of NR vulcanizate filled with basic magnesium carbonate was dense and evenly covered on the vulcanizate surface. |
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