A Ziegler-type spherical cap model reveals early stage ethylene polymerization growth versus catalyst fragmentation relationships.

ABSTRACT: Polyolefin catalysts are characterized by their hierarchically complex nature, which complicates studies on the interplay between the catalyst and formed polymer phases. Here, the missing link in the morphology gap between planar model systems and industrially relevant spherical catalyst particles is introduced through the use of a spherical cap Ziegler-type catalyst model system for the polymerization of ethylene. More specifically, a moisture-stable LaOCl framework with enhanced imaging contrast has been designed to support the TiCl₄ pre-active site, which could mimic the behaviour of the highly hygroscopic and industrially used MgCl₂ framework. As a function of polymerization time, the fragmentation behaviour of the LaOCl framework changed from a mixture of the shr

SUBMITTER: Bossers KW 

PROVIDER: S-EPMC9402950 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature