FTIR, 13C NMR, and GPC analysis of high-propylene content Co- and Terpolymers with ethylene and higher α-olefins synthesized with Etlnd2ZrCl2/MAO

Abstract

This article reports the results of propylene/α-olefin copolymerization and propylene/ethylene/α-olefin terpolymerization using low concentrations (less than 5 mol %) of long α-olefins such as 1-octene, 1-decene, and 1-dodecene. Kinetics data are presented and discussed. The highest activity was found with the longest α-olefin studied (1-dodecene). A possible explanation is proposed for this and other characteristics of the polymers obtained. The effect of low-ethylene contents (4 mol % in the gas phase) on the copolymerization of propylene/α-olefins was also examined. The polymers synthesized were characterized by 13C NMR, gel permeation chromatography, DSC, Fourier transform infrared spectroscopy, and wide-angle X-ray scattering.