6533b86dfe1ef96bd12ca11f
RESEARCH PRODUCT
Novel strategic approach for the thermo- and photo- oxidative stabilization of polyolefin/clay nanocomposites
Sahar Al-malaikaRossella ArrigoNadka Tzankova DintchevaNadka Tzankova DintchevaElisabetta Moricisubject
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)Macromoleculedescription
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 hindered phenol Irganox® 1076). These findings can be explained in terms of the ability of the organo-modifier containing the in-built antioxidant function to act locally at the interface between the clay silicate layers and the polymer macromolecules thus contributing to the improved stability of the polymer observed both during long-term thermal- and photo-oxidative treatments.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-11-01 |