Different behavior of Cp2ZrCl2 /MAO catalytic system in 1-hexene homopolymerization and 1-hexene/5-hexene 1-ol copolymerization

1-hexene homopolymerization and 1-hexene/5-hexene-1-ol copolymerization were conducted using metallocene, Cp2ZrCl2, catalyst with methylaluminoxane (MAO) as activating agent. 13C-and 1H-NMR analyses were carried out to identify the tacticity and termination reaction mechanisms of (co)polymerization. Our results showed that this catalytic system produces homopolymer chains with, vinylidene (CH2=CRR , Vd, resulted from 1,2-inserted chain-end) end structure and with 74 % isotacticity; while that in the copolymer both Vd (resulted from 1,2-inserted mechanism, 70 %) and di-substituted vinylene (2Vn, resulted from 2,1- inserted mechanism, 30 %) chain ends have been seen

کلیدواژه ها:

Metallocene catalyst ، 1-hexene ، 5-hexene-1-ol ، copolymerization ، polyolefin