Premium
Development of a refined poly(propylene) growth model for silica supported metallocene catalyst systems
Author(s) -
Zechlin Joachim,
Steinmetz Bernd,
Tesche Bernd,
Fink Gerhard
Publication year - 2000
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(20000301)201:5<515::aid-macp515>3.0.co;2-e
Subject(s) - metallocene , polymerization , polymer chemistry , materials science , polymer , catalysis , chemical engineering , octene , diffusion , phase (matter) , post metallocene catalyst , chemistry , organic chemistry , composite material , copolymer , thermodynamics , engineering , physics
The poly(propylene) growth process on silica supported metallocene catalysts has been examined by means of electron microscopy and kinetic investigations. It was possible to extend the polymerization process and to identify different polymerization phases with different characteristic kinetic data by lowering the reaction temperature in the slurry phase. EDX analysis of microtome sections of a polymerized model system led to the development of a refined polymer growth model. It was found that the addition of activating hydrogen reduces the initial diffusion limitations as well as a prepolymerization step with 1‐octene in the bulk phase.