| Effect of Co-crosslinking Agents on High Temperature Water Resistance of Tetrafluoroethylene-propylene Rubber Compounds |
| Received:January 04, 2024 Revised:March 13, 2025 |
| DOI：10.12136/j.issn.1000-890X.2025.06.0431 |
| Key Words: crosslinking agent；tetrafluoroethylene-propylene rubber；high temperature water resistance；physical property |
| Author Name | Affiliation | E-mail | | LI Hang | Sinopec Petroleum Engineering Technology Research Institute Co,Ltd,Beijing | lihang_jida@163.com | | LI Xinliang | 中石化科学技术研究中心 | | | CONG Chuanbo* | China University of Petroleum | | | LIAO Hongqian | Sinopec Petroleum Engineering Technology Research Institute Co.,Ltd | | | LIU Mingchao | China University of Petroleum | |
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| Abstract: |
| 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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