.png){kind=icon}
.png){kind=icon}
Return
Towards One-Pot Synthesis of Trimodal HDPE/UHMWPE In-Reactor Blends by CrOx/VOx/CpCr/SiO2 Tri-Metallic Catalysts
.png){kind=icon}
PRE
AI
S
L
R
Y
J
X
N
Y
T
B
Y
DOI：10.1002/app.71152.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Trimetallic catalysis provides a potential route for the one-pot production of multimodal PE with balanced mechanical and processing properties. Herein, a series of CrOx/VOx/CpCr/SiO2 trimetallic catalysts are constructed by grafting CrCp2 onto a CrOx/VOx/SiO2 with tunable CrCp2 loadings and benchmarked against mono- and bimetallic catalysts. FT-IR spectroscopy confirmed successful CrCp2 immobilization, and the catalyst containing 0.25 wt% CrCp2 exhibited the highest productivity. Owing to the distinct H2 sensitivities of the three active sites, both molecular weight (MW) and molecular weight distribution (MWD) can be efficiently regulated through CrCp2 loading and H2 partial pressure, enabling the synthesis of tri- or broad-modal PE in a single reactor. Compared with unimodal PE of comparable MW, the trimodal PE exhibited lower melt viscosity and an improved stiffness-toughness balance.
Keywords:
ethylene/1-hexene copolymerization
hydrogen response
trimetallic catalysis
trimodal polyethylene
Journal
IF:
2.8
Papers:
3.4K
Citations:
6.9W
Organization
Cited Papers