Preliminary investigations on polymerization catalysts composed of lanthanocene and methylaluminoxane

摘要: The polymerization of butadiene(Bd), isoprene(Ip) and styrene(St) has been examined using the six catalyst systems composed lanthanocene, (C5H9Cp)2NdCl(I), (C5H9Cp)2SmCl(II), (MeCp)2Sm OAr'(III), (Ind)2NdCl(IV), Me2Si(Ind)2NdCl(V) (Flu)2NdCl(VI), methylaluminoxane(MAO) respectively. All them can be used to form polyisoprene with molecular weights 1 10 thousand cis-1,4-unit contents 41 47%. (I), (II) (III) also polybutadiene 20 62 78%. In addition, catalysts from (V) are still active for St gives a syndio -rich random polystyrene. It is noteworthy that homopolymerization Bd, Ip in same condition.