6533b823fe1ef96bd127ebc3
RESEARCH PRODUCT
Photochemical stabilization of linear low-density polyethylene/clay nanocomposites: Towards durable nanocomposites
Elisabeth FantonFrancesco Paolo La MantiaJean-luc GardetteSandrine Morlat-theriasNadka Tzankova DintchevaVincenzo Malatestasubject
Materials sciencePolymers and PlasticsInfrared spectroscopy02 engineering and technology010402 general chemistry01 natural sciencesDurabilitychemistry.chemical_compoundMetal deactivatorImpurityPolymer chemistryMaterials Chemistrychemistry.chemical_classificationNanocompositeNanocompositePolymerPolyethylene021001 nanoscience & nanotechnologyCondensed Matter PhysicsDurabilityStabilization0104 chemical sciencesLinear low-density polyethylene[CHIM.POLY]Chemical Sciences/PolymerschemistryChemical engineeringMechanics of MaterialsPolyethylene0210 nano-technologydescription
International audience; This article reports a study of the chemical modifications of LLDPE/nanoblend nanocomposites exposed to UV light in conditions of artificially accelerated ageing and natural weathering. Analysis by infrared spectroscopy of the chemical modifications produced by photoageing shows that the presence of an organo-clay leads to the decrease of the oxidation induction time of the polymer (LLDPE), which results in lower durability of the nanocomposites. Protection against photooxidation was tested with different kinds of UV stabilizers and with a metal deactivator. It is shown that the metal deactivator is very efficient in stabilizing the nanocomposite since it totally cancels the prodegradant effect of the organo-clay. This confirms the role played by iron impurities in natural clays. The use of a metal deactivator offers a new insight into the stabilization strategy for nanocomposites.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-10-01 |