Abstract
Abstract An advanced spectroscopic analysis by Soft X-ray Emission Spectrometry (SXES) was applied for the first time to the characterization of a heterogeneous Ziegler-Natta catalyst, which comprised TiCl4 and dibutylphthalate (DBP) supported on MgCl2. The high energy resolution capability of SXES made it possible to quantitatively detect outermost shell orbit signals of Lα at 452 eV and Lβ at 458 eV of Ti atom. These were assigned to Ti species interacting with DBP and MgCl2, respectively. From the correlation between the signal intensity ratios and the catalytic performances, it was presumed that Ti species interacting with MgCl2 should work as active sites for propylene polymerization.
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