Title: The First Vanadium-Oxide-Based UHMWPE Catalyst Supported on Chemically Modified Silica Gel
Abstract: Macromolecular Chemistry and PhysicsVolume 218, Issue 7 1600443 Full Paper The First Vanadium-Oxide-Based UHMWPE Catalyst Supported on Chemically Modified Silica Gel Yulong Jin, Yulong Jin State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 ChinaSearch for more papers by this authorRuihua Cheng, Ruihua Cheng State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 ChinaSearch for more papers by this authorXuelian He, Xuelian He State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 ChinaSearch for more papers by this authorZhen Liu, Zhen Liu State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 ChinaSearch for more papers by this authorNing Zhao, Ning Zhao State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 ChinaSearch for more papers by this authorBoping Liu, Corresponding Author Boping Liu [email protected] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 ChinaE-mail: [email protected] for more papers by this author Yulong Jin, Yulong Jin State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 ChinaSearch for more papers by this authorRuihua Cheng, Ruihua Cheng State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 ChinaSearch for more papers by this authorXuelian He, Xuelian He State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 ChinaSearch for more papers by this authorZhen Liu, Zhen Liu State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 ChinaSearch for more papers by this authorNing Zhao, Ning Zhao State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 ChinaSearch for more papers by this authorBoping Liu, Corresponding Author Boping Liu [email protected] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 ChinaE-mail: [email protected] for more papers by this author First published: 07 February 2017 https://doi.org/10.1002/macp.201600443Citations: 14Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract Novel vanadium-oxide-based catalysts supported on alumina, zirconia, or titania-modified silica, which are able to synthesize ultrahigh molecular weight polyethylene (UHMWPE), are successfully developed. Compared with the unmodified silica supported catalyst, the activities of the modified catalysts are substantially enhanced. By changing the polymerization temperature (Tp) from 90 to 60 °C, the molecular weight of the produced UHMWPE can be easily regulated from 2 × 106 to more than 6 × 106 g mol−1. It is the first time that chloride-free nonsingle site catalysts have been developed to synthesize UHMWPE within such a broad range of Tp. Catalyst characterization by NH3-temperature-programmed desorption and pyridine-Fourier transform infrared spectroscopy reveals that the modified catalysts have increased acidity derived from both Lewis and Brønsted acid sites. The X-ray photoelectron spectroscopy characterization indicates that the vanadium on the modified catalysts is more electron deficient. Thus, the acidity of the catalysts and the electronic state of the vanadium play a critical role in determining the activity of the vanadium active sites for ethylene polymerization. Citing Literature Volume218, Issue7April 20171600443 RelatedInformation
Publication Year: 2017
Publication Date: 2017-02-07
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 18
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