三二烯作为金属二烯催化烯聚合物的支架
Pavel S Kulyabin1, Mikhail I Sharikov1, Vyatcheslav V Izmer1
1Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia. voskoboy@med.chem.msu.ru.
Dalton transactions (Cambridge, England : 2003)
|May 20, 2024
概括
具有三基的新型金属催化剂在烯聚合物中显示出有前途. 这些催化剂,特别是Ty7,产生具有独特区域误差的高同位性聚烯,验证预测模型.
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:
- 金属催化剂对于烯聚合是至关重要的,其连接物结构显著影响了聚合物的特性.
- 三纪部分代表金属基因催化剂的新联体变异,需要对它们的催化行为进行调查.
- 定量结构-属性关系 (QSPR) 模型可以预测催化剂性能,但需要验证新的联结体架构.
研究的目的:
- 合成和评估具有不同位置的三基组的新型金属催化剂.
- 评估这些催化剂在烯聚合和乙烯/1-烯共聚合中的性能.
- 将实验结果与QSPR预测进行比较,并评估模型的推断能力.
主要方法:
- 合成金属复合物 (Ty1-Ty8) 在二甲基基桥接 bis(indenyl) 框架上与三甲基部分.
- 使用合成的催化剂进行烯聚合和乙烯/1-烯共聚合实验.
- 分析聚合物战术性和区域选择性,并与QSPR模型预测进行比较.
主要成果:
- 用三素连接体合成的金属烯催化剂已成功合成和测试.
- 催化剂Ty7证明了生产高同位性聚烯的能力,其区域误差值为2.1的显著8%.
- 实验数据与QSPR预测有很好的相关性,即使对于与训练集有显著结构偏差的催化剂.
结论:
- 三基改性金属为控制聚合物微观结构提供了一条新的途径.
- QSPR模型展示了这些新型催化剂结构的预测能力,突出了它们在催化剂设计中的实用性.
- 催化剂Ty7在生产具有特定区域缺陷的聚烯方面的独特性能需要进一步调查.
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