Premium
Propene Polymerisation with rac ‐[Me 2 Si(2‐Me‐4‐( α ‐naphthyl)‐1‐Ind) 2 ]ZrCl 2 as a Highly Active Catalyst: Influence of Monomer Concentration, Polymerisation Temperature and a Heterogenising Support
Author(s) -
Frediani Marco,
Kaminsky Walter
Publication year - 2003
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/macp.200350062
Subject(s) - propene , catalysis , thermal stability , polymer chemistry , chemistry , polymerization , metallocene , homogeneous , ziegler–natta catalyst , ethylene , polymer , organic chemistry , physics , thermodynamics
Propene was polymerised at high temperatures (up to 90 °C) using rac ‐[Me 2 Si(2‐Me‐4‐( α ‐naphthyl)‐1‐Ind) 2 ]ZrCl 2 /MAO as the catalytic system. The increasing deactivation reaction rate of the catalyst for polymerisations above 60 °C was less for a silica supported catalyst compared with the homogeneous one. The isotacticity of polypropene decreases from 99 to 96%. Also the morphology changes with different temperatures.Increasing of the thermal stability for the rac ‐[Me 2 Si(2‐Me‐4‐( α ‐naphthyl)‐1‐Ind) 2 ]ZrCl 2 /MAO/SiO 2 with respect of the rac ‐[Me 2 Si(2‐Me‐4‐( α ‐naphthyl)‐1‐Ind) 2 ]ZrCl 2 /MAO system.