Functionalized polypropylenes as efficient dispersing agents for carbon nanotubes in a polypropylene matrix; application to electromagnetic interference (EMI) absorber materials

Carbon nanotubes (CNTs) have been dispersed within polypropylene with the purpose to prepare electromagnetic interference (EMI) absorbers. In order to limit the reflectivity of the electromagnetic waves at the interface of the materials while achieving good absorbing properties, the CNTs concentrati...

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Vydané v:Polymer (Guilford) Ročník 51; číslo 1; s. 115 - 121
Hlavní autori: Thomassin, Jean-Michel, Huynen, Isabelle, Jerome, Robert, Detrembleur, Christophe
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Kidlington Elsevier Ltd 06.01.2010
Elsevier
Elsevier Science
Predmet:
Applied sciences
carbon nanotube
Carbon nanotubes
Chemistry
Chimie
Composites
electromagnetic interferences (EMI) shielding material
EMI shielding
Engineering, computing & technology
Exact sciences and technology
Forms of application and semi-finished materials
Ingénierie, informatique & technologie
Materials science & engineering
nanocomposite
nanostructured materials
Physical, chemical, mathematical & earth Sciences
Physique, chimie, mathématiques & sciences de la terre
Polymer industry, paints, wood
Polypropylene
Science des matériaux & ingénierie
Technology of polymers
Carbon nanotubes
Polypropylene
EMI shielding
Mixing
Electrical conductivity
Electrical properties
Dispersion degree
Propylene polymer
Absorptivity
Electromagnetic shielding
Experimental study
Compatibilizer
Functional polymer
Radiation absorption
Multiwalled nanotube
Morphology
Concentration effect
Nanocomposite
Manufacturing
Growth from melt
Growth from solution
ISSN:0032-3861, 1873-2291
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Shrnutí:Carbon nanotubes (CNTs) have been dispersed within polypropylene with the purpose to prepare electromagnetic interference (EMI) absorbers. In order to limit the reflectivity of the electromagnetic waves at the interface of the materials while achieving good absorbing properties, the CNTs concentration must be kept low (<3 wt%) which means that a perfect dispersion must be ensured. Since CNTs do not disperse well within apolar polymer matrices such as polypropylene, two compatibilizers bearing aromatic moieties, i.e. pyrene and pyridine, able to develop π-π interactions with the CNTs have been synthesized starting from polypropylene grafted by maleic anhydride (PP-g-MA). A masterbatch is first prepared by dispersion of CNTs within the compatibilizers by melt-mixing and coprecipitation followed by further dispersion within the PP matrix. Rheological and electromagnetic characterizations of the nanocomposites have demonstrated the efficiency of these compatibilizers to promote the dispersion of CNTs in PP and the good EMI shielding effectiveness of the PP matrix at a low CNTs concentration (2 wt%). [Display omitted]
Bibliografia:scopus-id:2-s2.0-72249099636
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2009.11.012