The "superlubricity State" of Carbonaceous Fillers on Polyethylene-Based Composites in a Molten State

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dc.contributor.authorFerreira E.H.C.
dc.contributor.authorAndrade R.J.E.
dc.contributor.authorFechine G.J.M.
dc.date.accessioned2024-03-12T23:50:45Z
dc.date.available2024-03-12T23:50:45Z
dc.date.issued2019
dc.description.abstract© 2019 American Chemical Society.It is very well known that the incorporation of fillers into polymers increases their viscosity in a molten state; however, results contrary to this have been reported when graphite (Gr), graphite oxide (GrO), and graphene oxide (GO) among other carbonaceous fillers are used. Many authors have justified the reduction in polymer viscosity due to the slipping interlayers of the Gr, GrO, and GO fillers. The slipping interlayer cannot explain the reduction in polymer viscosity since the shear stresses produced or applied during rheological tests are lower than the interlayer shear strength of these fillers. Here, rheological experiments with two types of polyethylenes and Gr, GrO, and GO as fillers were carried out to elucidate this phenomenon. Remarkably, it was observed that the viscosity reduction occurs due to the presence of agglomerates in the composites. The agglomerates contain many flake-flake contacts out of registry (superlubricity state), which have very low slipping resistance. The slipping of these contacts promotes the reduction in polymer viscosity during rheological tests. The elucidation of the superlubricity state phenomenon proposed here may contribute to the understanding of the carbonaceous filler influence during the deformation of polymer composites.
dc.description.firstpage9620
dc.description.issuenumber24
dc.description.lastpage9631
dc.description.volume52
dc.identifier.doi10.1021/acs.macromol.9b01746
dc.identifier.issn1520-5835
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/35138
dc.relation.ispartofMacromolecules
dc.rightsAcesso Restrito
dc.titleThe "superlubricity State" of Carbonaceous Fillers on Polyethylene-Based Composites in a Molten State
dc.typeArtigo
local.scopus.citations23
local.scopus.eid2-s2.0-85077116771
local.scopus.subjectCarbonaceous fillers
local.scopus.subjectGraphite oxide
local.scopus.subjectInterlayer shear strength
local.scopus.subjectPolymer composite
local.scopus.subjectPolymer viscosity
local.scopus.subjectRheological experiment
local.scopus.subjectRheological test
local.scopus.subjectViscosity reduction
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85077116771&origin=inward
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