0000000000299171

AUTHOR

Jean-luc Gardette

showing 3 related works from this author

Photooxidative behaviour of polyethylene/polyamide-6 blends

2010

International audience; The photochemical behaviour of several polyethylene/polyamide-6 blends was studied under conditions of artificial accelerated weathering. Particular attention was paid to five different compositions ranging from pure polyethylene to pure polyamide with blends of PE/PA-6 of various compositions: 75/25, 50/50 and 25/75 wt/wt%. Analysis by infrared spectroscopy of the chemical modifications caused by photooxidation showed that exposing the polyethylene/polyamide-6 blends to UV-light irradiation led to the formation of oxidation photoproducts in both polymer phases. In agreement with both the mechanical and spectroscopic analyses, the photooxidation rate of the blends wa…

Reaction mechanismMaterials sciencePolymers and PlasticsInfrared spectroscopy02 engineering and technology010402 general chemistry01 natural scienceschemistry.chemical_compoundPhase (matter)Polymer chemistryMaterials ChemistryIrradiationchemistry.chemical_classificationPolymer blendPolymerPolyethylene021001 nanoscience & nanotechnologyCondensed Matter PhysicsPhotooxidation behaviour0104 chemical sciences[CHIM.POLY]Chemical Sciences/PolymerschemistryChemical engineeringInfrared analysisMechanics of MaterialsPolyamidePolymer blend0210 nano-technologyMechanical propertie
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Photochemical stabilization of linear low-density polyethylene/clay nanocomposites: Towards durable nanocomposites

2008

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 can…

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-technology
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Improvement of the mechanical properties of photo-oxidized films after recycling

2002

Mechanical recycling of post-consumer plastics gives rise, in most cases, to secondary materials with mechanical properties worse than those of the reclaimed polymer. This is mostly due to the thermomechanical treatment undergone during the melt reprocessing operations. In this work, low density polyethylene films have been photo-oxidized in artificial accelerated ageing conditions and then the brittle films have been melt reprocessed. It is shown that the secondary material, after reprocessing, shows mechanical properties, in particular elongation at break, better than those of the photo-oxidized films. This behaviour has been attributed to the fact that the melt reprocessing has the effec…

chemistry.chemical_classificationMaterials sciencePolymers and PlasticsOxidative degradationPolymerCondensed Matter PhysicsMolten stateLow-density polyethyleneBrittlenesschemistryMechanics of MaterialsMaterials ChemistryPhotochemical degradationComposite materialElongationOxygen starvationPolymer Degradation and Stability
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