| 润滑脂对丁腈橡胶硫化胶性能的影响 |
| Effect of Lubricating Grease on Properties of NBR Vulcanizate |
| 投稿时间：2023-01-30 修订日期：2023-01-30 |
| DOI：10.12136/j.issn.1000-890X.2024.10.0789 |
| 中文关键词: 丁腈橡胶 润滑脂老化 热空气老化 力学性能 |
| 英文关键词: NBR lubricating grease aging hot air aging mechanical property |
| 基金项目: |
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| 中文摘要: |
| 通过模拟油封工作状况对丁腈橡胶（NBR）硫化胶进行热空气和润滑脂加速老化试验。结果表明：随着热空气和润滑脂老化时间的延长，NBR硫化胶的力学性能均逐渐下降；在隔绝空气的润滑脂中浸泡的NBR硫化胶的力学性能损失较小，在未隔绝空气的润滑脂中浸泡的NBR硫化胶的力学性能损失较大，NBR硫化胶存在明显的橡胶分子链裂解现象；润滑脂酸度直接影响NBR硫化胶的力学性能，润滑脂酸度大会加速NBR硫化胶的橡胶分子主链的双键断裂。 |
| 英文摘要: |
| The hot air and lubricating grease accelerated aging tests of nitrile butadiene rubber（NBR）vulcanizate were carried out by the simulating working condition of oil seals.The results showed that，as the increasing hot air and lubricating grease aging time，the mechanical properties of NBR vulcanizate gradually decreased.The mechanical property loss of NBR vulcanizate soaked in air isolated lubricating grease was smaller，while the mechanical property loss of NBR vulcanizate soaked in non air isolated lubricating grease was relatively larger，because there was a significant phenomenon of rubber molecular chain cracking in NBR vulcanizate.The acidity of lubricating grease directly affects the mechanical properties of NBR vulcanizate，and the acidity of lubricating grease could accelerate the double bond cracking of rubber molecular main chain of NBR vulcanizate. |
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