Gas-Phase Ethylene Polymerization by Single-Site Cr Centers in a Metal–Organic Framework | Zendy

Hoyoung D. Park | Zendy; Robert J. Comito | Zendy; Zhenwei Wu | Zendy; Guanghui Zhang | Zendy; Nathan D. Ricke | Zendy; Chenyue Sun | Zendy; Troy Van Voorhis | Zendy; Jeffrey T. Miller | Zendy; Yuriy RománLeshkov | Zendy; Mircea Dincă | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Gas-Phase Ethylene Polymerization by Single-Site Cr Centers in a Metal–Organic Framework

Author(s) -

Hoyoung D. Park,

Robert J. Comito,

Zhenwei Wu,

Guanghui Zhang,

Nathan D. Ricke,

Chenyue Sun,

Troy Van Voorhis,

Jeffrey T. Miller,

Yuriy RománLeshkov,

Mircea Dincă

Publication year - 2020

Publication title -

acs catalysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 4.898

H-Index - 198

ISSN - 2155-5435

DOI - 10.1021/acscatal.9b03282

Subject(s) - polymerization , polyethylene , ethylene , dispersity , catalysis , polymer chemistry , materials science , coordination polymerization , chemistry , phase (matter) , metal , chain transfer , chemical engineering , solution polymerization , radical polymerization , organic chemistry , polymer , engineering

We report a systematic study on the gas-phase polymerization of ethylene by a metal-organic framework (MOF) catalyst. Cr3+-exchanged MFU-4l (Cr(III)-MFU-4l, MFU-4l = Zn5Cl4(BTDD)(3), H2BTDD = bis(1H-1,2,3,-triazolo[4,5-b],[4',5'-i])dibenzo[1,4]dioxin)) serves as an exemplary system to demonstrate prereaction treatment with alkylaluminum species as a simple method to isolate an active MOF catalyst for liquid-free polymerization of ethylene. AlMe3-treated Cr(III)-MFU-4l subjected to 40 bar of ethylene exhibits a polymerization activity of 52 000 mol(Ethylene)center dot mol(Cr)(-1)center dot h(-1), an order of magnitude higher than that observed in a slurry-phase reaction with Cr(III)-MFU-4l and excess alkylaluminum species. Furthermore, product polyethylene exhibits a low polydispersity index of 1.36 and a free-flowing granular morphology favorable for industrial processing, highlighting the advantages conferred by the single-site MOF catalysts in gas-phase ethylene polymerization.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research