| 云母粉/玻璃粉/助烧剂并用对硅橡胶性能的影响 |
| Effect of Mica Powder/Glass Powder/Sintering Aid Blending on Properties of Silicone Rubber |
| 投稿时间：2020-10-10 修订日期：2020-10-10 |
| DOI：10.12136/j.issn.1000-890X.2022.01.0034 |
| 中文关键词: 助烧剂 硅橡胶 云母粉 玻璃粉 阻燃剂 烧蚀 阻燃性能 |
| 英文关键词: sintering aid silicone rubber mica powder glass powder flame retardant ablation flame retardant property |
| 基金项目:中国铁道科学研究院集团有限公司院基金资助项目（1551JH7606） |
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| 中文摘要: |
| 研究自制助烧剂与阻燃剂云母粉和玻璃粉并用对硅橡胶物理性能和阻燃性能以及烧蚀后外观形貌和残质量
率的影响。结果表明：助烧剂促进云母粉的烧结，云母粉/玻璃粉/助烧剂并用体系（并用比4/1/1）的烧结效果优于云母
粉/玻璃粉并用体系（并用比2/1）和云母粉/助烧剂并用体系（并用比2/1）；云母粉/玻璃粉/助烧剂并用体系的加入降低了
硅橡胶的拉伸性能，但促进了硅橡胶在高温下能快速形成相结构均一、致密、连续、表面细腻和光滑的陶瓷化硬壳，其可
阻隔热和氧进入硅橡胶内部，使硅橡胶的热分解速率降低，氧指数、垂直燃烧等级和三点弯曲强度提高，烧蚀后残质量率
增大。 |
| 英文摘要: |
| The effects of blending a self-made sintering aid with flame retardant mica powder and
glass powder on the physical properties and flame retardant properties of the silicone rubber，as well as the
appearance morphology and residual mass rate after the ablation process, were studied. The results showed
that，the sintering aid promoted the sintering of mica powder，and the mica powder/glass powder/sintering
aid blend（4/1/1 of blend ratio） had a better sintering effect than that of the mica powder/glass powder
blend（2/1 of blend ratio） and mica powder/sintering aid blend（2/1 of blend ratio）. The addition of mica
powder/glass powder/sintering aid blend reduced the tensile properties of the silicone rubber，but promoted
the rapid formation of a homogeneous，dense，continuous，smooth and fine ceramicized hard shell of the
silicone rubber at high temperature，which could block the heat and oxygen from entering the interior of the
silicone rubber，so that the thermal decomposition rate of the silicone rubber was reduced，the oxygen index，
vertical combustion grade and three-point bending strength were improved，and the residual mass rate after
ablation was increased. |
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