Access to Hydroxy‐Functionalized Polypropylene through Coordination Polymerization
作者:Yuanhao Zhong、Iskander Douair、Tiantian Wang、Chunji Wu、Laurent Maron、Dongmei Cui
DOI:10.1002/anie.201914747
日期:2020.3.16
polypropylene has proven a rather challenging goal in polymer science. Propylene can't be polymerized through a radical mechanism, and its coordination copolymerization with polar monomers is frustrated by catalyst poisoning. Herein, we report a new strategy to reach this target. The coordination polymerization of allenes by rare-earth-metal precursors affords pure 1,2-regulated polyallenes, which are
含有羟基的聚乙烯的制备已经通过在苛刻条件下进行自由基共聚然后醇解的方法进行了工业化。相比之下,羟基官能化聚丙烯在聚合物科学中已证明是一个颇具挑战性的目标。丙烯不能通过自由基机理进行聚合,而且催化剂中毒会阻碍丙烯与极性单体的配位共聚。在此,我们报告了一种实现这一目标的新策略。稀土金属前体进行的烯丙基配位聚合可提供纯的1,2-调节的聚烯丙基,可通过随后的硼氢化/氧化反应轻松地将其转化为聚(烯丙醇)类似物。惊人地 后聚合改性后,丙二烯与丙烯的共聚反应得到了前所未有的羟基官能化聚丙烯。通过DFT模拟进行的机理解释表明,是动力学而非热力学控制。