Search results for "thermo-oxidative stability"

showing 4 items of 4 documents

Sonication-Induced Modification of Carbon Nanotubes: Effect on the Rheological and Thermo-Oxidative Behaviour of Polymer-Based Nanocomposites.

2018

The aim of this work is the investigation of the effect of ultrasound treatment on the structural characteristics of carbon nanotubes (CNTs) and the consequent influence that the shortening induced by sonication exerts on the morphology, rheological behaviour and thermo-oxidative resistance of ultra-high molecular weight polyethylene (UHMWPE)-based nanocomposites. First, CNTs have been subjected to sonication for different time intervals and the performed spectroscopic and morphological analyses reveal that a dramatic decrease of the CNT's original length occurs with increased sonication time. The reduction of the initial length of CNTs strongly affects the nanocomposite rheological behavio…

sonicationMaterials scienceCNTs; Nanocomposites; Rheology; Sonication; Thermo-oxidative stability; UHMWPE; Materials Science (all)SonicationUHMWPE02 engineering and technologyCarbon nanotube010402 general chemistry01 natural scienceslcsh:TechnologyArticlelaw.inventionchemistry.chemical_compoundUHMWPE; CNTs; sonication; nanocomposites; rheology; thermo-oxidative stabilityThermal conductivityRheologylawnanocompositesthermo-oxidative stabilityGeneral Materials Sciencelcsh:Microscopylcsh:QC120-168.85chemistry.chemical_classificationNanocompositeCNTslcsh:QH201-278.5lcsh:TPolymerPolyethylene021001 nanoscience & nanotechnology0104 chemical scienceschemistryChemical engineeringlcsh:TA1-2040Interphaselcsh:Descriptive and experimental mechanicsrheologylcsh:Electrical engineering. Electronics. Nuclear engineeringMaterials Science (all)0210 nano-technologylcsh:Engineering (General). Civil engineering (General)lcsh:TK1-9971Materials (Basel, Switzerland)
researchProduct

Influence of antioxidants intercalated layered double hydroxides (AO-LDHs) on the thermo-oxidative stability of pla and pe based nanocomposites

2016

Layered double hydroxides (LDHs) are excellent host matrices for storage and delivery of antioxidants (AOs).

antioxidant layered double hydroxides thermo-oxidative stability nanocomposites
researchProduct

Thermo-oxidative stabilization of poly(lactic acid)-based nanocomposites through the incorporation of clay with in-built antioxidant activity

2017

In this work, an innovative approach to overcome the issue of the poor thermo-oxidative stability of polymer/clay nanocomposites is proposed. Specifically, biodegradable poly(lactic acid) (PLA)-based nanocomposites, containing organo-modified clay with in-built antioxidant activity, were prepared. Through a two-step chemical protocol, a hindered phenol antioxidant was chemically linked to the ammonium quaternary salt which was then intercalated between the clay platelets [(AO)OM-Mt]. The nanocomposites were characterized and their thermo-oxidative stability during melt processing and under long-term thermal test conditions was investigated. PLA nanocomposites containing the (AO)OM-Mt showed…

Materials Chemistry2506 Metals and AlloysAntioxidantMaterials sciencePolymers and Plasticsmedicine.medical_treatmentSurfaces Coatings and FilmSalt (chemistry)02 engineering and technologybio-based nanocomposites; montmorillonite; poly(lactic acid) (PLA); thermo-oxidative stability; Chemistry (all); Surfaces Coatings and Films; Polymers and Plastics; Materials Chemistry; 2506; Metals and Alloysmontmorillonite010402 general chemistry01 natural sciencescomplex mixturesCoatings and Filmschemistry.chemical_compoundPolylactic acidpoly(lactic acid) (PLA)medicineMaterials ChemistryOrganic chemistrythermo-oxidative stabilitychemistry.chemical_classificationPolymers and PlasticNanocompositebio-based nanocompositesChemistry (all)Metals and AlloysGeneral ChemistryPolymer021001 nanoscience & nanotechnologybio-based nanocomposite0104 chemical sciencesSurfaces Coatings and FilmsLactic acidSurfacesMontmorillonitechemistryChemical engineering25060210 nano-technologyDispersion (chemistry)
researchProduct

Biopolyester-based systems containing naturally occurring compounds with enhanced thermooxidative stability

2016

Background This work presents a sustainable approach for the stabilization of polylactic acid (PLA) against thermo-oxidative aging. Methods Naturally occurring phenolic and polyphenolic compounds, such as ferulic acid (FerAc), vanillic acid (VanAc), quercetin (Querc) and vitamin E (VitE), were introduced into PLA. Results The preliminary characterization of the systems formulated containing different amounts of natural stabilizers showed that all compounds used acted as plasticizers, leading to a decrease in rheological functions with respect to neat PLA, without significantly modifying the crystallinity of the raw material. The study of the thermo-oxidative behavior of neat PLA and PLA/nat…

Hot TemperatureCoumaric AcidsPolyestersBiophysicsBiomedical EngineeringBioengineering02 engineering and technologyOxidative phosphorylationNaturally occurring stabilizers010402 general chemistryCoumaric acid01 natural sciencesPolylactic acidBiomaterialschemistry.chemical_compoundPolylactic acidDifferential scanning calorimetryVanillic acidthermo-oxidative stabilityOrganic chemistryVitamin EBio-based polymer systems; Differential scanning calorimetry; Naturally occurring stabilizers; Polylactic acid; Thermo-oxidation; Coumaric Acids; Hot Temperature; Oxidation-Reduction; Polyesters; Quercetin; Vanillic Acid; Vitamin E; Biophysics; Bioengineering; Biomaterials; Biomedical EngineeringVanillic AcidChemistryOxidation reductionGeneral MedicineBio-based polymer systems021001 nanoscience & nanotechnologyThermo-oxidation0104 chemical sciencesPolyesterPolilactic acidPolyphenolQuercetin0210 nano-technologyOxidation-Reductionnatural stabilizer
researchProduct