Premium
Thermal conductivity of high density polyethylene: Cold plasma modified graphite composites
Author(s) -
Ramosde Valle Luis F.,
NeiraVelázquez Maria G.,
BorjasRamos José J.,
Moggio Ivana,
Arias Eduardo,
GallardoVega Carlos A.,
SorianoCorral Florentino,
SoriaArguello Gustavo,
RamírezVargas Eduardo,
SánchezValdés Saúl,
EspinozaMartínez Adriana B.,
HernándezHernández Ernesto,
NarroCéspedes Rosa I.
Publication year - 2019
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.25283
Subject(s) - materials science , graphite , composite material , exfoliation joint , polyethylene , raman spectroscopy , differential scanning calorimetry , thermal conductivity , scanning electron microscope , x ray photoelectron spectroscopy , thermogravimetric analysis , graphene , chemical engineering , physics , engineering , optics , thermodynamics , nanotechnology
Natural graphite particles (NG) were surface modified via ethylene plasma treatment and characterized by infrared and Raman spectroscopy, thermo‐gravimetric analysis, scanning electron microscopy, X‐ray diffraction, and X‐ray photoelectron spectroscopy. Ethylene polymerized during plasma treatment forming both a thin layer on the graphite particles surface and polyethylene particles that penetrate into the graphite layers, favoring its delamination or exfoliation. This beneficial effect finally impacts in the thermal properties of the composites: in fact, thermal conductivity ( k ) determined via modulated differential thermal calorimetry is, in general, larger than that of the pure polyethylene because of the graphite contribution and, with a major increase for graphite composites obtained with the treated than untreated NG because of the better dispersion.