Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson, TX, 75080, USA.
Macromol Rapid Commun. 2017 Oct;38(19). doi: 10.1002/marc.201700427. Epub 2017 Aug 21.
Ziegler-Natta catalysts have played a major role in industry for the polymerization of dienes and vinyl monomers. However, due to the deactivation of the catalyst, this system fails to polymerize polar vinyl monomers such as vinyl acetate, methyl methacrylate, and methyl acrylate. Herein, a catalytic system composed of NdCl ⋅3TEP/TIBA is reported, which promotes a quasi-living polymerization of dienes and is also active for the homopolymerization of polar vinyl monomers. Additionally, this catalytic system generates polymyrcene-b-polyisoprene and poly(myrcene)-b-poly(methyl methacrylate) diblock copolymers by sequential monomer addition. To encourage the replacement of petroleum-based polymers by environmentally benign biobased polymers, polymerization of β-myrcene is demonstrated with a catalytic activity of ≈106 kg polymer mol Nd h .
齐格勒-纳塔催化剂在二烯和乙烯基单体的聚合工业中发挥了重要作用。然而，由于催化剂失活，该体系无法聚合极性乙烯基单体，如醋酸乙烯酯、甲基丙烯酸甲酯和丙烯酸甲酯。在此，报道了一种由 NdCl ⋅3TEP/TIBA 组成的催化体系，该体系可促进二烯的准活性聚合，同时也可引发极性乙烯基单体的均聚。此外，该催化体系通过顺序单体添加生成聚-myrcene-b-聚异戊二烯和聚(myrcene)-b-聚(甲基丙烯酸甲酯)两嵌段共聚物。为了鼓励用环境友好的生物基聚合物替代石油基聚合物，用催化活性约为 106 kg 聚合物 mol Nd h 的 NdCl ⋅3TEP/TIBA 催化体系进行了 β-myrcene 的聚合。
