| 高温柴油浸泡对丁腈橡胶硫化胶性能的影响 |
| Effect of High Temperature Diesel Oil Immersion on Properties of NBR Vulcanizates |
| 投稿时间：2020-05-19 修订日期：2020-05-19 |
| DOI：10.12136/j.issn.1000-890X.2022.02.0138 |
| 中文关键词: 丁腈橡胶 柴油 高温 浸泡 溶胀 交联 分子链断裂 拉伸性能 |
| 英文关键词: NBR diesel oil high temperature immersion swelling cross-linking molecular chain fracture tensile property |
| 基金项目:国家科技重大专项（2016ZX05051003）；中国石油天然气股份有限公司科技重大专项（2018E-1809） |
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| 中文摘要: |
| 研究高温柴油浸泡对丁腈橡胶（NBR）硫化胶性能的影响。对在120 ℃ 0#柴油（简称柴油）中分别浸泡0，7，14
和28 d的NBR硫化胶的质量变化率、体积变化率、密度、物理性能和玻璃化转变温度等进行测试。结果表明，高温柴油浸
泡对NBR硫化胶性能的影响明显，其中NBR硫化胶的拉伸性能下降率较大，在柴油中浸泡28 d的NBR硫化胶的拉伸强度
和拉断伸长率下降率均大于75%。浸泡初期（0～7 d），NBR硫化胶性能的主要影响因素为NBR硫化胶的溶胀行为；随着
浸泡时间的延长（7～14 d），主要影响因素转变为NBR分子链进一步交联；随着浸泡时间继续延长（14～28 d），主要影响
因素转变为NBR分子链断裂。 |
| 英文摘要: |
| The effects of high temperature diesel oil immersion on the properties of nitrile rubber（NBR）
vulcanizates were studied. The mass change rates，volume change rates，densities，physical properties and
glass transition temperatures of NBR vulcanizates that had been immersed in 120 ℃ 0# diesel oil（diesel oil
for short） for 0，7，14 and 28 d were tested. The results showed that，high temperature diesel oil immersion
had obvious effects on the properties of NBR vulcanizates. The tensile properties of NBR vulcanizates had
the large decrease. The tensile strength and elongation at break of the NBR vulcanizates immersed in diesel
oil for 28 d both decreased by more than 75%. In the early stage of immersing（0～7 d），the main change of
the NBR vulcanizates was swelling. As the immersion time continued to prolong（7～14 d），the main change
of the vulcanizates which affected the properties became the further cross-linking of the molecular chains. In
the late stage（14～28 d），the dominant change of the vulcanizates was NBR molecular chain fracture. |
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