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| 丁腈橡胶密封材料热/氧/应力耦合老化性能研究 |
| Study on Thermal/Oxygen/Stress Coupled Aging Properties of Nitrile Rubber Sealing Material |
| Received:October 21, 2025 Revised:October 21, 2025 |
| DOI：10.12137/j.issn.2095-5448.2026.03.0135 |
| 中文关键词: 丁腈橡胶；热/氧/应力耦合老化；质量损失率；压缩永久变形；交联密度 |
| 英文关键词: NBR；thermal/oxygen/stress coupled aging；mass loss rate；compression set；crosslink density |
| 基金项目: |
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| Author Name | Affiliation | E-mail | | ZHANG Xugang* | Shenyang Aircraft Industry (Group) Co., Ltd. | saczxg85@163.com | | ZHANG Fengling | Shenyang Aircraft Industry (Group) Co., Ltd. | | | LIU Chunmi | Shenyang Aircraft Industry (Group) Co., Ltd. | | | SONG Tijie | Shenyang Aircraft Industry (Group) Co., Ltd. | | | SHI Baocun | Shenyang Aircraft Industry (Group) Co., Ltd. | | | WANG Xu | Shenyang Aircraft Industry (Group) Co., Ltd. | | | YUAN Hao | Shenyang Aircraft Industry (Group) Co., Ltd. | |
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| 中文摘要: |
| 研究丁腈橡胶（NBR）密封材料热/氧/应力耦合老化性能。结果表明：NBR密封材料在热/氧/应力耦合作用下的质量损失率变化是添加剂挥发、橡胶老化断链及热氧老化等物理和化学反应的综合反映；交联反应和降解反应处于竞争状态，外界因素对橡胶材料断链降解反应和交联反应的影响程度不尽相同；压缩永久变形随老化时间的延长呈现先快速增长、后缓慢增长的趋势；NBR密封材料在热/氧/应力耦合作用下较易老化，因此在贮存和使用过程中应尽量避免3种老化条件同时出现，以延长橡胶制品的使用
寿命。 |
| 英文摘要: |
| The thermal/oxygen/stress coupled aging properties of nitrile rubber（NBR） sealing material were investigated.The results indicated that the mass loss rate of NBR sealing material under the combined effects of thermal/oxygen/stress was a comprehensive reflection of physical and chemical reactions such as additive volatilization，rubber chain scission aging，and thermal-oxidative aging.The crosslinking reaction and degradation reaction existed in a competitive state，with external factors exerting varying degrees of influence on the chain scission degradation reaction and crosslinking reaction of rubber materials.The compression set showed an initial rapid growth and subsequent slow growth trend with prolonged aging time.NBR sealing materials were more prone to aging under the combined effects of thermal/oxygen/stress，so it was advisable to avoid the simultaneous occurrence of these three aging conditions during storage and use to prolong the service life of rubber products. |
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