ISSN:
0360-6376
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Copolymerization of ethylene with mixtures of linear α-olefins C6-C36 in the presence of two heterogeneous Ziegler-Natta catalysts, δ-TiCl3-AlEt3 and TiCl4/MgCl2-AlEt3, at 90°C was studied by the GC method, and reactivity ratios for all paris ethylene-α-olefin were estimated from the data on olefin consumption in the reactions. In the case of the δ-TiCl3-AlEt3 system, the r2 value decreases from ca. 0.05 for 1-decene to ca. 0.02 for α-C22H44 and then remains approximately constant. This change is similar to the dependence of the modified steric parameter ESC of the olefin alkyl group on the size of the alkyl group. In the case of the supported TiCl4/MgCl2-AlEt3 system a similar variation of r2 with the length of the alkyl group were observed but the absolute values of r2 were six to ten times lower than those for the first catalytic system.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1984.170220206
