| 汽车用天然橡胶衬套开裂的失效分析 |
| Failure Analysis of Cracking of NR Bushing for Automobile |
| 投稿时间：2020-03-20 修订日期：2020-03-20 |
| DOI：10.12136/j.issn.1000-890X.2020.09.0701 |
| 中文关键词: 天然橡胶 汽车用衬套 开裂 失效 表观形貌 成分分析 热氧老化 |
| 英文关键词: NR bushing for automobile failure cracking appearance component analysis thermo-oxidative aging |
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| 中文摘要: |
| 通过表观形貌观察、表面元素分析、热重分析、密度测定以及裂解气相色谱-质谱的有机成分检测，分析汽车用天然橡胶（NR）衬套开裂失效的原因。结果表明：汽车用NR衬套发生开裂的原因是热氧老化；与未发生开裂样品相比，开裂样品的表面氧元素含量增大，热分解温度升高，密度增大，酚类抗氧剂消失。 |
| 英文摘要: |
| Through appearance observation，surface element analysis，thermogravimetric analysis，density determination and organic component detection of pyrolysis gas chromatography-mass spectrometry，the cause of cracking failure of natural rubber（NR） bushing for automobile was analyzed.The results showed that the cracking of the NR bushing for automobile was caused by thermo-oxidative aging.Compared with the sample without cracking，the surface oxygen element content of the cracked sample increased，the thermal decomposition temperature increased，the density increased，and the phenolic antioxidant was disappeared. |
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