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| 宽温域耐15#航空液压油氟硅橡胶性能的研究 |
| Study on Properties of Fluorosilicone Rubber with Good Resistance against 15# Aviation Hydraulic Oil under Wide Temperature Range |
| Received:August 24, 2021 Revised:August 24, 2021 |
| DOI：10.12137/j.issn.2095-5448.2022.03.0122 |
| 中文关键词: 均聚氟硅橡胶 改性共聚氟硅橡胶 宽温域 密封 耐油性能 耐低温性能 |
| 英文关键词: homopolymerized fluorosilicone rubber modified copolymerized fluorosilicone rubber wide temperature range sealing oil resistance low temperature resistance |
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| 中文摘要: |
| 采用均聚氟硅橡胶和改性共聚氟硅橡胶，通过机械共混法制备宽温域氟硅橡胶，研究均聚氟硅橡胶/改性共聚氟硅橡胶并用比对胶料物理性能、耐15#航空液压油性能及耐低温性能的影响。结果表明：随着改性共聚氟硅橡胶用量增大，胶料的硬度逐渐降低，拉伸强度变化很小，拉断伸长率和拉断永久变形逐渐增大但增幅不大，耐15#航空液压油性能有所降低，耐低温性能明显提高；当均聚氟硅橡胶/改性共聚氟硅橡胶并用比为50/50时，胶料的脆性温度（多试样法）达到－64.7 ℃，在－50，－55，－60 ℃下的压缩耐寒系数分别达到0.51，0.44，0.39，低温回缩试验10%回缩率对应的温度（TR10）达到－67.2 ℃；当均聚氟硅橡胶/改性共聚氟硅橡胶并用比为70/30时，胶料的耐低温、耐15#航空液压油综合性能最佳，动密封圈在10个循环周期的台架试验中未出现泄漏、损伤和永久变形现象，在－60～150 ℃宽温域、15#航空液压油环境中具有良好的密封性能。 |
| 英文摘要: |
| The fluorosilicone rubber with wide temperature range was prepared by mechanical blending of homopolymerized fluorosilicone rubber and modified copolymerized fluorosilicone rubber.The effects of the blending ratio of homopolymerized fluorosilicone rubber/modified copolymerized fluorosilicone rubber on the physical properties，resistance against 15# aviation hydraulic oil and low temperature resistance of the compound were studied.The results showed that，with the increase of the amount of modified copolymer fluorosilicone rubber，the hardness of the compound decreased gradually，the change of tensile strength was very small，the elongation at break and permanent deformation at break increased gradually，but the increase was small，the oil resistance decreased，and the low temperature resistance was improved significantly.When the blending ratio of homopolymerized fluorosilicone rubber/modified copolymerized fluorosilicone rubber was 50/50，the multi-sample method brittleness temperature of the compound was －64.7 ℃，the compression cold resistance coefficients at －50，－55 and －60 ℃ were 0.51，0.44，0.39 respectively，and TR10 was －67.2 ℃.When the blending ratio of homopolymerized fluorosilicone rubber/modified copolymer fluorosilicone rubber was 70/30，the comprehensive properties of low temperature resistance and oil resistance of the compound were the best，the dynamic sealing ring had no leakage，damage and permanent damage in the bench test of 10 cycles and had good sealing performance in －60～150 ℃ wide temperature range and 15# aviation hydraulic oil environment. |
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