13C NMR Analysis of -Olefin Enchainment in Poly(-olef

详细信息    查看全文

• 作者：Elizabeth F. McCord ; Stephan J. McLain ; Lissa T. J. Nelson ; Steven D. Ittel ; Daniel Tempel ; Christopher M. Killian ; Lynda K. Johnson ; Maurice Brookhart
• 刊名：Macromolecules
• 出版年：2007
• 出版时间：February 6, 2007
• 年：2007
• 卷：40
• 期：3
• 页码：410 - 420
• 全文大小：215K
• 年卷期：v.40,no.3(February 6, 2007)
• ISSN：1520-5835

文摘

-Diimine complexes of palladium and nickel catalyze the polymerization of -olefins to givenew materials that range from low-T_g elastomers to low-melting, partially crystalline polymers. The ¹H and ¹³CNMR spectra of the resulting polymers have been assigned in detail. Many unique microstructural features of thecomplex polymers have been identified. Mechanistic models that involve the 1,2- and 2,1-insertion of the -olefins,chain walking, and insertion at certain points along the chain have been constructed. The complex microstructurescan be explained using a small set of rules for palladium catalysts which is expanded slightly to account for thenickel catalysts.