Comparison of Ethylene Copolymerization with Norbornene and 5-Norbornene-2-methanol by Using Ph2C(Cp)(Flu)ZrCl2/MAO,Macromolecular Chemistry and Physics

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Comparison of Ethylene Copolymerization with Norbornene and 5-Norbornene-2-methanol by Using Ph2C(Cp)(Flu)ZrCl2/MAO
Macromolecular Chemistry and Physics ( IF 2.5 ) Pub Date : 2023-02-28 , DOI: 10.1002/macp.202300005
Wei Wang ₁ , Shuzhang Qu ₁ , Xinwei Li ₁ , Jian Chen ₁

Affiliation

Both cyclic olefin copolymer (COC) and functionalized polyolefins are high-performance polyolefin materials with different outstanding properties. The introduction of functional groups into COC has the potential to yield materials that combine the advantages of both. In this work, ethylene copolymers with norbornene (NBE) or 5-norbornene-2-methanol (NBMO) are synthesized by using a metallocene catalyst. The activity and the molecular weight of copolymer of the former is much higher than that of the latter. A joint deactivation-chain transfer mechanism is proposed to interpret these observations. Chain transfer is further discussed. Through regression analysis, it is considered that the chain transfer mode of the two comonomers is the same. Three methods for the calculation of NBMO incorporation are proposed and compared, and a more suitable method is obtained, on the basis of the resonance assignment. The comparison of the copolymerization of ethylene with NBE and NBMO may indicate that NBMO has a higher coordination probability but a slower insertion rate compared to NBE.

中文翻译：

使用 Ph2C(Cp)(Flu)ZrCl2/MAO 比较乙烯与降冰片烯和 5-降冰片烯-2-甲醇的共聚

环烯烃共聚物（COC）和功能化聚烯烃都是高性能聚烯烃材料，具有不同的突出性能。将官能团引入 COC 有可能产生结合两者优点的材料。在这项工作中，乙烯与降冰片烯 (NBE) 或 5-降冰片烯-2-甲醇 (NBMO) 的共聚物是通过使用茂金属催化剂合成的。前者的共聚物活性和分子量均远高于后者。提出了一种联合失活链转移机制来解释这些观察结果。进一步讨论链转移。通过回归分析，认为两种共聚单体的链转移方式相同。提出并比较了三种计算 NBMO 掺入的方法，并在共振分配的基础上得到了更合适的方法。乙烯与 NBE 和 NBMO 的共聚比较可能表明，与 NBE 相比，NBMO 具有更高的配位概率，但插入速率更慢。

更新日期：2023-02-28

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