| 助交联剂对四丙氟橡胶胶料耐高温水性能的影响 |
| Effect of Co-crosslinking Agents on High Temperature Water Resistance of Tetrafluoroethylene-propylene Rubber Compounds |
| 投稿时间：2024-01-04 修订日期：2025-03-13 |
| DOI：10.12136/j.issn.1000-890X.2025.06.0431 |
| 中文关键词: 助交联剂 四丙氟橡胶 耐高温水性能 物理性能 |
| 英文关键词: crosslinking agent tetrafluoroethylene-propylene rubber high temperature water resistance physical property |
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| 中文摘要: |
| 在过氧化二异丙苯/三烯丙基异氰脲酸酯交联体系的四丙氟橡胶胶料中分别加入不同用量八乙烯基多面体低聚倍半硅氧烷（OVPOSS）、N，N′-间亚苯基双马来酰亚胺（HVA-2）和三羟甲基丙烷三甲基丙烯酸酯（TMPTMA）作为助交联剂，对胶料的性能进行研究。结果表明，加入一定量OVPOSS可提高四丙氟橡胶胶料的硫化速率和交联密度。高温水老化前，仅有加入OVPOSS的四丙氟橡胶胶料的拉伸强度大于未加助交联剂的基础配方胶料。经300 ℃×24 h高温水老化后，加入5份OVPOSS的四丙氟橡胶胶料的拉伸强度最大，为7.24 MPa，体积变化率和质量变化率较小；加入9份HVA-2四丙氟橡胶胶料的拉伸强度最小，为0.82 MPa，说明四丙氟橡胶胶料已经失效；加入TMPTMA的四丙氟橡胶胶料的质量变化率和体积变化率呈增大趋势。综合来看，加入5份OVPOSS的四丙氟橡胶胶料的耐高温水性能最佳。 |
| 英文摘要: |
| Different amounts of octavinyl polyhedral oligomeric silsesquioxane（OVPOSS），N，N′-meta phenylene bismaleimide（HVA-2） and trimethylolpropane trimethylacrylate（TMPTMA） were added as co-crosslinking agents to the tetrafluoroethylene-propylene rubber compounds with dicumyl peroxide/triallyl isocyanurate crosslinking system，and the properties of the compounds were studied.The results showed that adding certain amount of OVPOSS could improve the vulcanization rate and crosslinking density of the tetrafluoroethylene-propylene rubber compound.Before aging in high temperature water，only the tensile strength of the tetrafluoroethylene-propylene rubber compound with OVPOSS was greater than that of the base compound without co-crosslinking agent.After aging in high temperature water at 300 ℃ for 24 h，the tensile strength of the tetrafluoroethylene-propylene rubber compound with 5 phr of OVPOSS was the maximum，which was 7.24 MPa，and the volume change rate and mass change rate was smaller.The tensile strength of the tetrafluoroethylene-propylene rubber compound with 9 phr of HVA-2 was the minimum，which was 0.82 MPa，indicating that the tetrafluoroethylene-propylene rubber compound had failed.The mass change rate and volume change rate of the tetrafluoroethylene-propylene rubber compound with TMPTMA showed an increasing trend.Overall，the tetrafluoroethylene-propylene rubber compound with 5 phr of OVPOSS had the best high temperature water resistance. |
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