Polymer, Vol.42, No.13, 5763-5769, 2001
Structure and viscoelastic properties of amorphous ethylene/1-hexene copolymers obtained with metallocene catalyst
Copolymerization of ethylene and I-hexene was performed with diphenylmethylidene (cyclopentadienyl-fluorenyl) zirconium dichloride (Ph2C(Cp) (Flu)ZrCl2) in combination with dimethylanilinium tetrakis-(pentafluorophenyl)borate ((Me2PhNH)(B(C6F5)(4)))/triisobutylalumi-num (i-Bu3Al) catalyst. This catalyst system produced ethylene/1-hexene random copolymers (EHRs) with high molecular weight and narrow molecular weight distribution. The theological properties of the rubbery EHRs were compared with those of the rubbery ethylene/ propylene copolymer (EPR). It was found that the rubbery plateau modulus G(N)(0) Of the EHR is much lower than that of the EPR.