Search results for " polyolefins"

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Novel strategic approach for the thermo- and photo- oxidative stabilization of polyolefin/clay nanocomposites

2017

Polyolefin/clay nanocomposites were prepared by melt mixing and their oxidative stability was studied under long-term thermo- and photo-oxidative test conditions in the absence and presence of a modified organo montmorillonite clay (OM-MMt) containing a chemically-bound hindered phenol antioxidant function, (AO)OM-Mt. It was found that nanocomposites based on both polyethylene (PE) and polyethylene-grafted-maleic anhydride (PEgMA) containing the (AO)OM-Mt gave a higher oxidative stability, along with better clay dispersion, compared to analogous PE or PEgMA-based nanocomposites containing an added (free) conventional antioxidant with a similar hindered phenol function (using the commercial …

Materials Chemistry2506 Metals and AlloysMaterials sciencePolymers and Plastics02 engineering and technologyCondensed Matter Physic010402 general chemistry01 natural scienceschemistry.chemical_compoundHindered phenolsMaterials ChemistryOrganic chemistryMechanics of Materialchemistry.chemical_classificationNanocompositePolymers and PlasticMetals and AlloysPolymerPolyolefinsPolyethylene021001 nanoscience & nanotechnologyCondensed Matter PhysicsSilicate0104 chemical sciencesPolyolefinPolyolefinThermo- and photo- oxidative stabilizationHindered phenolMontmorillonitechemistryChemical engineeringClay Polymer Nanocomposites (CPN); Hindered phenols; Polyolefins; Stabilised organo montmorillonite; Thermo- and photo- oxidative stabilization; Condensed Matter Physics; Mechanics of Materials; Polymers and Plastics; Materials Chemistry; 2506; Metals and AlloysMechanics of Materials25060210 nano-technologyDispersion (chemistry)Stabilised organo montmorilloniteClay Polymer Nanocomposites (CPN)Macromolecule
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Advanced ultra-high molecular weight polyethylene/antioxidant-functionalized carbon nanotubes nanocomposites with improved thermo-oxidative resistance

2015

Multiwalled carbon nanotubes (CNTs) functionalized with hindered phenol moieties are dispersed in ultra-high molecular weight polyethylene (UHMWPE), and the stabilizing action of the antioxidant (AO) functionalized CNTs (AO-f-CNTs) is studied through a combination of rheological and spectroscopic (FT-IR) analyses. The effectiveness of two alternative compounding methods, namely hot compaction (HC) and melt mixing (MM), is compared. The combination of high temperature and mechanical stress experienced during MM brings about noticeable degradation phenomena of the matrix already in the course of the compounding step. Differently, the milder conditions of the HC process preserve the stability …

Materials sciencePolymers and PlasticsCarbon nanotubelaw.inventionnanotubesCoatings and Filmschemistry.chemical_compoundlawgraphene and fullerenesMaterials Chemistrydegradation graphene and fullerenes nanotubes polyolefinsComposite materialpolyolefindegradationchemistry.chemical_classificationUltra-high-molecular-weight polyethyleneNanocompositeChemistry (all)Metals and AlloysGeneral ChemistryPolymerPolyethyleneGraftingdegradation; graphene and fullerenes; nanotubes; polyolefins; Chemistry (all); Surfaces Coatings and Films; Polymers and Plastics; Materials Chemistry; 2506; Metals and AlloysSurfaces Coatings and FilmsSurfaceschemistryCompoundinggraphene and fullerenenanotube2506Dispersion (chemistry)polyolefins
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