Journal
ADVANCED FIBER MATERIALS
Volume 4, Issue 4, Pages 786-794Publisher
SPRINGERNATURE
DOI: 10.1007/s42765-022-00136-9
Keywords
Hydroxy-functionalized UHMWPE; Ansa-Fluorenylamidodimethyltitanium; Silica-supported MMAO; UHMWPE fiber; Creep resistance
Funding
- Fundamental Research Funds for the Central Universities [2232020A-05]
- National Natural Science Foundation of China [21174026]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
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Granular hydroxyl-functionalized UHMWPE fibers were successfully prepared through the activation of [(BuNSiMe2)-Bu-t(2,7-(t)Bu(2)Flu)]TiMe2 by silica-supported modified-methylaluminoxane. The obtained fibers showed improved creep resistance and hydrophilic properties without losing tensile strength, compared to unfunctionalized UHMWPE fibers or commercial HUMWPE fibers.
Granular hydroxyl-functionalized UHMWPE was successfully prepared through copolymerization of ethylene and 10-undecen-1-ol protected by tri-iso-butylaluminum using a titanium complex. [(BuNSiMe2)-Bu-t(2,7-(t)Bu(2)Flu)]TiMe2 was activated in hexane by silica-supported modified-methylaluminoxane. Without any additional pretreatments, the obtained polymer powders were transformed into fibers through a gel-spinning and heat drawing process. When compared to fibers generated from the equivalent unfunctionalized UHMWPE or the commercial HUMWPE, both creep resistance and hydrophilic properties were improved in the hydroxy-functionalized UHMWPE fibers without losing tensile strength.
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