Search results for "Acrylic acid"

showing 3 items of 153 documents

Surface modification of poly(ethylene-co-acrylic acid) with amino-functionalized silica nanoparticles

2011

In this work we studied the possibility to achieve a hybrid-surface through the modification, via a facile wet chemical process, of the surface of films of poly(ethylene-co-acrylic acid) (EAA) with amino-modified silica nanoparticles. Films of EAA were preliminarily activated by the introduction of -COCl groups on their surface. Silica nanoparticles were thereafter covalently bound on the polymeric surface as confirmed by FTIR, ATR-FTIR, XPS, NMR and SEM determinations. The nanoparticles formed a multilayer on the film surface and covered almost uniformly the whole film surface. Direct measurements of superficial amino groups by titration allowed us to detect a concentration of about 18 nmo…

nanostructured hybrid materialsMaterials scienceTRIALKOXYSILANE DERIVATIVESNanoparticleGeneral ChemistryCOATED MAGNETIC NANOPARTICLESContact anglechemistry.chemical_compoundSurface modificationchemistryChemical engineeringX-ray photoelectron spectroscopyPolymer chemistryMaterials Chemistrynanoparticles functionalizationSurface modificationWettingFourier transform infrared spectroscopyCOLLOIDAL SILICACATALYZED SYNTHESISAcrylic acidPolymeric surfaceJournal of Materials Chemistry
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Effects of Polyacrylic Acid Pre-Treatment on Bonded-Dentine Interfaces Created with a Modern Bioactive Resin-Modified Glass Ionomer Cement and Subjec…

2018

Objectives: Resin-modified glass ionomer cements (RMGIC) are considered excellent restorative materials with unique therapeutic and anti-cariogenic activity. However, concerns exist regarding the use of polyacrylic acid as a dentine conditioner as it may influence the bonding performance of RMGIC. The aim of this study was to evaluate the effect of different protocols for cycling mechanical stress on the bond durability and interfacial ultramorphology of a modern RMGIC applied to dentine pre-treated with/without polyacrylic acid conditioner (PAA). Methods: The RMGIC was applied onto human dentine specimens prepared with silicon-carbide (SiC) abrasive paper with or without the use of a PAA c…

polyacrylic acid treatmentGlass ionomer cement02 engineering and technologyCementos dentales.lcsh:TechnologyAdhesivos dentales.Dental adhesives.dentinechemistry.chemical_compound0302 clinical medicineDentinGeneral Materials ScienceComposite materiallcsh:QC120-168.85bioactiveBond strengthPolyacrylic acidAbrasive021001 nanoscience & nanotechnologyDentin.adhesionmedicine.anatomical_structureDental materials.0210 nano-technologylcsh:TK1-9971cycling mechanical stressresin-modified glass ionomer cementsPolyacrylic acid - Therapeutic use.Materials scienceArticle03 medical and health sciencesstomatognathic systemlongevityDental cementmedicineMateriales dentales.Odontología restauradora.lcsh:MicroscopyDentina.CementRemineralisationDental cements.lcsh:QH201-278.5lcsh:T030206 dentistrychemistrylcsh:TA1-2040lcsh:Descriptive and experimental mechanicslcsh:Electrical engineering. Electronics. Nuclear engineeringlcsh:Engineering (General). Civil engineering (General)Ácido poliacrílico - Uso terapéutico.Dentistry Operative.Materials
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Sequestration of biogenic amines by alginic and fulvic acids.

2006

The interaction of natural (alginic and fulvic acids) and synthetic (polyacrylic acid 2.0 kDa) polyelectrolytes with some protonated polyamines [diamines: ethylendiamine, 1,4-diaminobutane (or putrescine), 1,5-diaminopentane (or cadaverine); triamines: N-(3-aminopropyl)-1,4diaminobutane (or spermidine), diethylenetriamine; tetramine: N.N'-bis(3-aminopropyl)-1,4-diaminobutane (or spermine); pentamine: tetraethylene-pentamine; hexamine: pentaethylenehexamine] was studied at T=25 degrees C by potentiometry and calorimetry. Measurements were performed without supporting electrolyte, in order to avoid interference, and results were reported at I=0 mol L(-1). For all the systems, the formation of…

polyammonium-polycarboxylate interactionsAlginatesPolymersBiogenic aminesInorganic chemistryFulvic acidCarboxylic AcidsBiophysicsProtonationCalorimetryBiochemistryMedicinal chemistryElectrolyteschemistry.chemical_compoundbiogenic amineGlucuronic AcidPolyaminesBenzopyransAlginic acidPolyacrylic acidCadaverineChemistryHexuronic AcidsOrganic ChemistryPolyacrylic acidPentaminesequestrationPolyelectrolytesPolyelectrolyteQuaternary Ammonium CompoundsBiogenic amines; Fulvic acid; Alginic acid; Polyacrylic acid; sequestrationModels ChemicalDiethylenetriamineThermodynamicsAmine gas treatingProtonsMathematics
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