Polymerization processes

A polymerization process comprising contacting at least one olefin under polymerization conditions with a catalyst system comprising a polymer bound metallocene and an aluminoxane cocatalyst:

• wherein said polymer bound metallocene is represented by the formula QM(R).sub.m ZY.sub.n ;
• wherein Q is polystyrene;
• wherein M is Si, C, Ge, Sn, P, or N;
• wherein each R is a hydrocarbyl group independently selected from the group consisting of alkyl and cycloalkyl groups containing 1 to 20 carbon atoms, aryl groups containing 6 to 20 carbon atoms, and cyclopentadienyl-type groups, with the proviso that at least one R group is a cyclopentadienyl-type group and when M is C at least two R groups are cyclopentadienyl-type groups, wherein said cyclopentadienyl-type groups are cyclopentadienyl, substituted cyclopentadienyl, indenyl, substituted indenyl, fluorenyl, or substituted fluorenyl, wherein the substituents are hydrocarbyl groups containing 1 to 12 carbon atoms, alkoxy groups containing 1 to 12 carbon atoms, or halide;
• wherein m is 2 or 3;
• wherein Z is Zr, Hf, Ti, or V;
• wherein each Y is individually selected from the group consisting of halides, hydrogen, methyl, and cyclopentadienyl-type groups containing 5 to 36 carbon atoms;
• wherein n is 2 or 3;
• and
• wherein said aluminoxane contains repeating units of the formula ##STR2## wherein each R.sup.1 is a hydrocarbyl group containing 1-8 carbon atoms and x is 2 to 50.