L. Oliva et al., CHAIN PROPAGATION RATE CONSTANTS FOR GAS-PHASE POLYMERIZATION OF PROPENE AND 1-BUTENE WITH ZIEGLER-NATTA CATALYSTS, Macromolecular chemistry and physics, 195(1), 1994, pp. 211-216
C-13 NMR analysis of propene/1-butene block copolymers obtained by gas
-phase polymerization with Ziegler-Natta catalysts allows the determin
ation of the propagation mte constants for the homopolymerization of t
he two monomers. They are very similar for the Solvay type catalyst de
lta-TiCl3/AlMe3 and the supported catalyst TiCl4/MgCl2/Phthalate/AlMe3
. The constant of propene polymerization is three times higher than th
at of 1-butene polymerization. The high value of the constant found fo
r propene polymerization is in agreement with the literature value det
ermined by the stopped flow polymerization method.