Quarterpolymerizations of ethene/propene/hexene/ethylidenenorbornene and ethene/propene/octene/ethylidenenorbornene with [Me2C(3-MeCp)(Flu)]ZrCl2/MAO

Quarterpolymerizations of ethene/propene/hexene/ethylidenenorbornene and et hene/propene/octene/ethylidenenorbornene were carried out using the catalyt ic system [Me2C(3-MeCp)(Flu)]ZrCl2 / MAO to determine whether it is possibl e to lower the glass transition temperature of an EPDM. The influence of th e quartermonomer on the polymerization activity and on the product properti es, such as the incorporation rates of the three other monomers, the molar mass and molar mass distribution of the polymer were looked at. It was foun d that the activity is decreased using 1-hexene on the one hand and 1-octen e on the other hand as quartermonomer with the effect being more distinct u sing the former. Both 1-hexene and 1-octene are incorporated to the detrime nt of propene and ENB, the reduction of the ENB content being more distinct . The molar masses of the polymers are not affected by the substitution of these two monomers by the quartermonomer. The glass transition temperature, however, using 1-hexene or 1-octene, was reduced - in the case of the latt er by more than 10 degreesC from -50 to -62 degreesC.