对于聚乙烯弹性体的三甲氧基和基基调催化剂
Ming Liu1, Min Sun1, Yanping Ma2
1State Key Laboratory of Petroleum Molecular & Process Engineering, SINOPEC Research Institute of Petroleum Processing Co., Ltd., Beijing 100083, China.
Molecules (Basel, Switzerland)
|July 12, 2025
概括
新复合物与新联体具有高活性和热稳定性,可用于乙烯聚合,产生具有调节性质和优良热塑性弹性体特性的分支聚乙烯.
科学领域:
- 有机金属化学 有机金属化学
- 聚合物科学 聚合物科学
- 催化剂是一种催化剂.
背景情况:
- 开发用于乙烯聚合的高效催化剂对于生产先进的多聚烯至关重要.
- 连接体设计在调整催化剂活性,稳定性和聚合物性质方面发挥着关键作用.
- 化替代剂可以显著影响连接体和催化剂的电子和硬质性质.
研究的目的:
- 为了合成和表征新的 (II) 化物复合物与对三甲氧化和甲-功能化1,2-bis (II) 胺) 乙纳连接物.
- 评估这些复合物在乙烯聚合过程中的催化性能.
- 研究产生的聚乙烯的特性,并探索它们作为热塑性弹性体的潜力.
主要方法:
- 合成五种 (Ni1-Ni5) 化物复合物与量身定制的双 (bis) 胺 (imine) 甲联体.
- 使用元素分析,19F NMR和FT-IR光谱学进行了表征.
- 单晶X射线衍射用于Ni2和Ni4的结构阐明.
- 由乙烯二化物 (EtAlCl2) 或乙烯六化物 (EASC) 激活的乙烯聚合研究.
- 聚合物特性分析,包括分支,抗拉强度和弹性回收.
主要成果:
- 新型复合物 (Ni1-Ni5) 已成功合成和表征.
- 复合物表现出异常高的催化活性 (高达22.0 × 10^6 g PE mol^-1(Ni) h^-1) 和热稳定性 (4.82 × 10^6 g PE mol^-1(Ni) h^-1在80°C).
- 生产的聚乙烯具有高度分支,根据聚合条件可调节的特性.
- 由此产生的聚合物表现出优异的抗拉强度 (高达20.7 MPa) 和弹性回收 (高达58%),表明了热塑性弹性体的行为.
结论:
- 合成的复合物是乙烯聚合的高效催化剂.
- 三甲基和甲基组增强了催化性能和聚合物特性.
- 开发的聚乙烯显示出作为高性能热塑性弹性体的前景.
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