| 二硫代氨基甲酸镧双配体稀土促进剂第二配体对三元乙丙橡胶性能的影响 |
| Effect of Second Ligand of Double Ligand Lanthanum Dithiocarbamate Accelerator on Properties of EPDM |
| 投稿时间：2019-07-01 修订日期：2019-07-01 |
| DOI：10.12136/j.issn.1000-890X.2020.04.0276 |
| 中文关键词: 稀土促进剂 双配体 三元乙丙橡胶 交联密度 耐热氧老化性能 多功能助剂 |
| 英文关键词: rare earth accelerator double ligands EPDM cross-link density thermal oxidative aging resistance multifunctional additive |
| 基金项目:国家自然科学基金资助项目（51503004，51573007）；中央高校基本科研业务费专项资金项目（JD1805） |
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| 中文摘要: |
| 研究二乙基二硫代氨基甲酸-二苯胍-镧（LaDC-D）、二乙基二硫代氨基甲酸-硫脲-镧（LaDC-TU）、二乙基二硫代氨基甲酸-2-巯基苯并咪唑-镧（LaDC-MB）和二乙基二硫代氨基甲酸-2，6-二叔丁基-4-甲基苯酚-镧（LaDC-BHT）4种双配体稀土促进剂对三元乙丙橡胶（EPDM）性能的影响，并与单配体稀土促进剂二乙基二硫代氨基甲酸镧（LaDC）进行对比。结果表明：与LaDC相比，LaDC-D具有较好的硫化促进活性，两种配体发生了较好的协同活化作用，混炼胶的t90明显缩短，硫化胶的交联密度增大；第二配体为具有防老效果的两种双配体稀土促进剂LaDC-MB与LaDC-BHT硫化胶的撕裂强度较高，抗切割性能和耐热氧老化性能较好，其中LaDC-MB硫化胶的耐热氧老化性能最好；双配体稀土促进剂不仅能有效提高混炼胶的硫化效率，而且能改善硫化胶的耐热氧老化性能，为橡胶多功能助剂的开发提供了新思路。 |
| 英文摘要: |
| Compared with single ligand rare earth accelerator lanthanum diethyldithiocarbamate（LaDC），the effect of four kinds of rare earth accelerator [LaDC-diphenylguanidine （LaDC-D），LaDC-thiourea （LaDC-TU），LaDC-2-mercaptobenzimidazole（LaDC-MB），LaDC-2，6-ditertbutyl-4-methylphenol （LaDC-BHT）] with double ligands on the properties of ethylene-propylene-diene rubber（EPDM） was studied.The results showed that，compared with LaDC，LaDC-D had better vulcanization promoting activity due to the better synergistic activation of the two ligands，t90 of the corresponding compound was significantly shortened，and the crosslinking density of the vulcanizate increased. The vulcanizate with the rare earth accelerators having anti-aging second ligand，LaDC-MB and LaDC-BHT，exhibited better tear strength，cutting resistance and thermal oxidative aging resistance，and the one with LaDC-MB had the best thermal oxidative aging resistance．The double-ligand rare earth accelerator could not only effectively improve the vulcanization efficiency of the compound but also improve the thermal oxidative aging resistance of the vulcanizate，providing a new idea for the development of multifunctional rubber additives. |
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