LI Wei, HUANG Xingbing, WANG Jingdai, et al. Bimodal polyethylene produced by oscillating operation of hydrogen in single gas-phase polymerization reactor[J]. CIESC Journal, 2009, (2): 365-371.
LI Wei, HUANG Xingbing, WANG Jingdai, et al. Bimodal polyethylene produced by oscillating operation of hydrogen in single gas-phase polymerization reactor[J]. CIESC Journal, 2009, (2): 365-371.DOI:
A novel technology was presented to produce bimodal polyethylene with home-made metallocene catalyst APE-1G(Cp*2ZrCl2·2LiCl·THF) in single gas-phase reactor through oscillating operation of hydrogen periodically.The effects of hydrogen concentration
oscillating time distribution and oscillating operation period on molecular weight distributions were studied.The results showed that catalyst activity and molecular weight of the obtained polymers decreased due to the addition of hydrogen.Bimodal polyethylene obtained through oscillating hydrogen concentration periodically had a polydispersity index (PDI) range from 11.2 to 34.2.It was viable to control molecular weight distributions of bimodal polyethylene through hydrogen oscillating operation
especially through changing the oscillating operation period.