Ziegler-Natta catalytic systems |
| |
| Authors: | L. Cavallo J. -M. Ducéré Rosalisa Fedele A. Melchior Maria Chiara Mimmi G. Morini F. Piemontesi Marilena Tolazzi |
| |
| Affiliation: | (1) Department of Chimica, University of Salerno, v. Ponte don Melillo, Fisciano (SA), 84084 Salerno, Italy;(2) Department of Scienze e Tecnologie Chimiche, University of Udine, v. del Cotonificio 108, 33100 Udine, Italy;(3) Basell Poliolefine Italia, Centro Ricerche G. Natta, p. Donegani 12, 44100 Ferrara, Italy;(4) Department of Scienze e Tecnologie Biomediche, University of Udine, p.le Kolbe 4, 33100 Udine, Italy |
| |
| Abstract: | A calorimetric investigation on the reactions of TiCl4 with phthalates in 1,1,2,2-tetrachloroethane (TCE) is presented in order to better understand the complex interactions present in Ziegler-Natta catalytic systems. The Lewis bases diethyl isophthalate (L1), diethyl terephthalate (L2) and the ortho-isomer diethylphthalate (L3), have been chosen to study how the substituent positions could influence the energy and the stoichiometry of the complexation reactions. FTIR spectroscopy was used to obtain information on the coordination mode of the ligands and diffusion measurements by NMR was carried out to verify the presence of oligo-or polymeric species. Experimental results were compared with theoretical calculations based on Density Functional Theory (DFT). |
| |
| Keywords: | calorimetry DFT diffusion-ordered NMR titanium tetrachloride Ziegler-Natta catalysts |
| 本文献已被 SpringerLink 等数据库收录！ |
|
