Polymerization of 3-Methyl-1-butene in the Presence
of Heterogeneous TitaniumMagnesium
and Homogeneous Metallocene Catalysts¹

L. A. Rishina*, N. M. Galashina*, P. M. Nedorezova*², A. N. Klyamkina*,
A. M. Aladyshev*, V. I. Tsvetkova*, and V. I. Kleiner**

* Semenov Institute of Chemical Physics, Russian Academy of Sciences,
ul. Kosygina 4, Moscow, 119991 Russia

** Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences,
Leninskii pr. 29, Moscow, 119991 Russia

Received August 14, 2002;
Revised Manuscript Received October 17, 2002

Abstract—The polymerization of 3-methyl-1-butene with heterogeneous titanium–magnesium and homoge-
neous metallocene catalysts that differ in symmetry type, such as Me₂C(3-Me-Cp)(Flu)ZrCl₂ (C₁ symmetry)
and Ph₂C(Cp)(Flu)ZrCl₂ (_s symmetry), was studied. The activity of metallocene catalysts is much higher than
that of titanium–magnesium systems under comparable conditions. Poly(3-methyl-1-butene) prepared using
titanium–magnesium catalysts and Me₂C(3-Me-Cp)(Flu)ZrCl₂ is an isotactic polymer with a degree of crystal-
linity of 28.5–54%. A polymer synthesized in the presence of Ph₂C(Cp)(Flu)ZrCl₂ is virtually amorphous. It
was shown that the regularity of poly(3-methyl-1-butene) chains depends on the type of metallocene catalyst
used.

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