Abstract
Ethylene/1-pentene copolymers were synthesized using Cp 2ZrCl 2( 1)/MAO and [(CO) 5W C(Me)OZr(Cp) 2Cl]( 2)/MAO catalyst systems. The copolymers were characterized by SEC, DSC, FTIR and 13C NMR spectroscopy. The copolymers synthesized with [(CO) 5W C(Me)OZr(Cp) 2Cl]( 2)/MAO had higher average molecular weights and broader polydispersities compared to those produced with Cp 2ZrCl 2( 1)/MAO. The chemical heterogeneity was investigated by SEC-FTIR and fractionation techniques. All copolymers showed a higher incorporation of the 1-pentene in the low molecular weight fraction as revealed by SEC-FTIR. Crystallization analysis fractionation (CRYSTAF) showed a broad chemical composition distribution (CCD) for all the copolymers synthesized with these two catalyst systems. Selected copolymers were also analyzed using an automated preparative molecular weight fractionation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
