Martin-Fabiani et al. ACS Macro Letters -Second revision .pdf (1.04 MB)
Chain dynamics of ultrahigh molecular weight polyethylene composites with graphene oxide nanosheets
journal contribution
posted on 2021-09-13, 10:58 authored by Nacho Martin-Fabiani-CarratoNacho Martin-Fabiani-Carrato, Stavros X Drakopoulos, Giuseppe Forte, Sylvain Prévost, Ingo Hoffmann, Sara RoncaWe investigate the melt chain dynamics of ultrahigh molecular weight polyethylene (UHMWPE) and its composites with graphene oxide (GO) nanosheets by means of neutron spin echo spectroscopy. For the GO concentrations explored, we observe hindered chain dynamics with respect to the pure UHMWPE. We propose a model where a fraction of the polymer is immobilized on top and at the bottom of GO sheets. This model enables us to provide a microscopic measurement of the adsorbed and free polymer fractions, as well as the thickness of the adsorbed layer. Our experiments provide experimental nanoscopic evidence of GO hindering entanglement formation in a polymer melt, a phenomenon that had been observed at the macroscale before via rheological measurements.
Funding
UK Research and Innovation Future Leaders Fellowship (MR/T02061X/1)
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials
Published in
ACS Macro LettersVolume
10Issue
4Pages
460 - 465Publisher
American Chemical Society (ACS)Version
- AM (Accepted Manuscript)
Rights holder
© American Chemical SocietyPublisher statement
This paper was accepted for publication in the journal ACS Macro Letters and the definitive published version is available at https://doi.org/10.1021/acsmacrolett.1c00007Acceptance date
2021-03-24Publication date
2021-03-29Copyright date
2021ISSN
2161-1653eISSN
2161-1653Publisher version
Language
- en
Depositor
Dr Nacho Martin-Fabiani Carrato. Deposit date: 7 September 2021Usage metrics
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