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| 耐低温超低压缩永久变形三元乙丙橡胶的配方设计 |
| Formula Design of EBT EPDM with Low-temperature Resistance and Ultra-low Compression Set |
| Received:September 21, 2022 Revised:September 21, 2022 |
| DOI：10.12137/j.issn.2095-5448.2024.01.0015 |
| 中文关键词: 三元乙丙橡胶；压缩永久变形；脆性温度；低温回缩试验；炭黑 |
| 英文关键词: EPDM；compression set；brittle temperature；low temperature retraction test；carbon black |
| 基金项目: |
| 中图分类号: |
| Author Name | Affiliation | E-mail | | SU Chunyi* | Anhui Zhongding Sealing Parts Co Ltd | sucy@zhongdinggroup.com | | DING Yeqian | Anhui Zhongding Sealing Parts Co Ltd | | | YANG Chun | Anhui Zhongding Sealing Parts Co Ltd | | | HE Pei | Anhui Zhongding Sealing Parts Co Ltd | | | KE Yuchao | Anhui Zhongding Sealing Parts Co Ltd | | | TIAN Youfeng | Anhui Zhongding Sealing Parts Co Ltd | | | ZHANG Weiguo | Anhui Zhongding Sealing Parts Co Ltd | | | ZHU Lei | Anhui Zhongding Sealing Parts Co Ltd | | | WU Chen | Anhui Zhongding Sealing Parts Co Ltd | |
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| 中文摘要: |
| 研究由乙烯、丁烯和亚乙基降冰片烯为单体，茂金属催化合成的新型三元乙丙橡胶（EBT EPDM）和通用三元乙丙橡胶（EPDM）的耐低温性能以及炭黑种类对EBT EPDM胶料耐低温性能的影响。结果表明：与EPDM胶料相比，EBT EPDM胶料的t10和t90均缩短，Fmax－FL增大；EBT EPDM硫化胶在低温条件（－40 ℃×72 h）下的压缩永久变形减小了71.5%，脆性温度降低了37.7%，低温回缩温度TR10最低，低温弯曲后表面未出现裂纹，耐低温性能优异；随着炭黑粒径的增大，EBT EPDM硫化胶的低温压缩永久变形减小，脆性温度降低；在相同低温条件下，EBT EPDM硫化胶的压缩永久变形与硅橡胶硫化胶相近，但EBT EPDM价格远低于硅橡胶，可拓宽其在低温密封领域的应用。 |
| 英文摘要: |
| The low-temperature resistance of a new type of ethylene-butene-diene monomer（EBT EPDM） synthesized by metallocene catalysis and universal ethylene-propylene-diene monomer（EPDM） was studied，as well as the effect of carbon black type on the low-temperature resistance of EBT EPDM compound.The results showed that，compared with EPDM compound，the t10 and t90 of EBT EPDM compound were shortened，and Fmax－FL increased.At low temperature condition（－40 ℃×72 h），the compression set of EBT EPDM vulcanizates decreased by 71.5%，the brittleness temperature decreased by 37.7%，the low temperature retraction temperature TR10 was the low，and there were no cracks on the surface after low-temperature bending，demonstrating excellent low temperature resistance.With the increase of carbon black particle size，the low temperature compression set and brittleness temperature of EBT EPDM vulcanizate decreased.Under the same low temperature conditions，the compression set of EBT EPDM vulcanizate was similar to that of silicone rubber vulcanizate，but the price of EBT EPDM was much lower than that of silicone rubber，which could broaden its application in the field of low temperature sealing. |
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