Subramanyam, Ummadisetty ; Sivaram, Swaminathan (2007) Synthesis and characterization of poly(higher-α-olefin)s with a nickel(α-diimine)/methylaluminoxane catalyst system: effect of chain running on the polymer properties Journal of Polymer Science Part A: Polymer Chemistry, 45 (2). pp. 191-210. ISSN 0887-624X
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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/pola.21...
Related URL: http://dx.doi.org/10.1002/pola.21783
Abstract
Homopolymerization of octadecene-1 at different reaction conditions has been studied. Significant chain running can be seen at higher polymerization temperatures. Interestingly, insertion of octadecene-1 into a sterically hindered nickel-cation/carbon (secondary) bond is observed. The microstructure of the polymer was established using NMR spectroscopy. The effects of chain running on polymer melting, crystallization behavior, and dynamic mechanical thermal properties were studied using DSC and DMTA. The extent of chain running (i.e., 2,ω-, 1,ω-enchainments) decreases with an increase in the carbon number of α-olefins.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to John Wiley and Sons. |
| Keywords: | Chain Running; Crystallization; Glass Transition; Melt Transition; Nickel (α-diimine); NMR; Poly(α-olefin)s |
| ID Code: | 48557 |
| Deposited On: | 14 Jul 2011 13:02 |
| Last Modified: | 14 Jul 2011 13:02 |
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