Rajesh, A. ; Sivaram, S. (2011) Polymerization of ethylene to branched poly(ethylene)s using ansa-η5-monofluorenyl cyclohexanolato zirconium(IV) complex/methylaluminoxane Polymer Bulletin, 67 (3). pp. 383-399. ISSN 0170-0839
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Official URL: http://www.springerlink.com/content/0x5p1808353m41...
Related URL: http://dx.doi.org/10.1007/s00289-010-0387-6
Abstract
ansa-η5-Monofluorenyl cyclohexanolato zirconium complex 3 was shown to be active for the polymerization of ethylene when activated with methylaluminoxane (MAO) at 5 bar. Up to a polymerization temperature of 40 °C, 3/MAO resulted in linear poly(ethylene)s with saturated chain ends. However, at polymerization temperatures of 60, 80, and 100 °C, a mixture of branched poly(ethylene)s, linear α-olefins and long chain alkanes was obtained. The poly(ethylene)s produced at 80 and 100 °C exhibited a bimodal molecular weight distribution indicative of multiple active species. Very high molecular weight (Mv > 5 × 105) linear poly(ethylene)s were obtained using 3/MAO at 25 °C.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Springer. |
| Keywords: | ansa-Monofluorenyl Complex; Methyl Aluminoxane; Ethylene Polymerization; Branched Poly(ethylene)s; Bimodal MWD |
| ID Code: | 48492 |
| Deposited On: | 14 Jul 2011 10:20 |
| Last Modified: | 14 Jul 2011 10:20 |
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