[article]
Titre : |
Preparation and characterization of water-based polyurethane–acrylic hybrid nanocomposite emulsion based on a new silane-containing acrylic macromonomer |
Type de document : |
texte imprimé |
Auteurs : |
Hamid Javaheriannaghash, Auteur ; Nasrin Ghazavi, Auteur |
Année de publication : |
2012 |
Article en page(s) : |
p. 323-336 |
Note générale : |
Bibliogr. |
Langues : |
Américain (ame) |
Catégories : |
acrylique, Acide L'acide acrylique ou acide acroléïque ou acide prop-2-énoïque est un composé organique de formule brute C3H4O2 et de formule semi-développée CH2=CHCOOH. C'est un acide carboxylique et un alcène vinylique, et se présente comme un liquide incolore à l'odeur âcre.
L'acide acrylique et ses esters, les acrylates, sont utilisés dans la fabrication de matières plastiques, dans les peintures acryliques et dans divers autres polyacryliques qui ont de multiples usages. Anhydride maléique Caractérisation EthanolamineL'éthanolamine, également appelée 2-aminoéthanol ou monoéthanolamine, est un composé chimique organique qui est à la fois une amine primaire (par son groupe amine) et un alcool primaire (par son groupe hydroxyle). À l'instar des autres amines, la monoéthanolamine se comporte en base faible. L'éthanolamine est un liquide toxique, inflammable, corrosif, incolore et visqueux ; son odeur est similaire à celle de l'ammoniac. Matériaux hybrides Monomères Polyuréthanes Revêtements en phase aqueuse:Peinture en phase aqueuse Silanes
|
Index. décimale : |
667.9 Revêtements et enduits |
Résumé : |
A new silane-containing acrylic macromonomer, maleimidedoethoxybutoxydimethylsiloxy butyl acrylate (MEBDMSBA), based on maleic anhydride (MA), ethanolamine (EA), 1,4-butanediol (BDO), dichlorodimethylsilane (DCDMS), and acrylic acid (AA) has been synthesized for formulation of waterborne polyurethane (WPU). Also a series of new silane-containing WPU, methyl methacrylate (MMA), MEBDMSBA, and montmorillonite (MMT) with organically modified montmorillonite (OMMT) content (1.25 wt%) hybrid nanocomposites have been successfully prepared by the emulsion polymerization in the presence of a WPU dispersion, using ammonium peroxodisulfate (APS) as an initiator. The WPU dispersion has been synthesized by a polyaddition reaction of isophorone diisocyanate (IPDI) on polypropylene glycol (PPG-1000) and dimethylol propionic acid (DMPA) as chain extender. The monomer was characterized by Fourier transformer infrared spectroscopy (FTIR), elemental analysis, proton (1H NMR), and carbon (13C NMR) nuclear magnetic resonance spectroscopes, respectively. The nanocomposite emulsions were also characterized using Fourier transform infrared spectroscopy (FTIR) and laser light scattering. Thermal properties of the copolymers were studied using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The OMMT was characterized by FTIR and X-ray diffraction (XRD). The morphology of copolymers was investigated by scanning electron microscopy (SEM) and transition electron microscopy (TEM), and then the effects of silane concentrations on the water absorption ratio were examined. Results showed that OMMT could improve the properties of emulsion; in other words, the properties of nanocomposite emulsion were better when compared with those of the silane–acrylate emulsion. |
Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of OMMT - Synthesis of bis-hydroxybutoxydimethyl silane (BHBDMS) - Synthesis of an imide ring and silane-containing acrylic macronomer (MEBDMSBA) - Preparation of polyurethane dispersion (PUD) - Semi-continuous emulsions polymerization using polyurethane dispersions - Morphology of P (U/A/Si)/OMMT hybrid emulsion - Film formation - Water absorption - Polymer characterization
- RESULTS AND DISCUSSION : Design of MEBDMSBA with silane and imide ring - NMR analysis of MEBDMSBA - FTIR spectra of MMT and OMMT - Distance of MMT and OMMT layers - FTIR spectrum of P (U/A/Si)OMMT nanocomposites - Thermal properties - Morphological characterization of P (U/A), P (U/A/Si), and P (U/A/Si)/OMMT nanocomposites - Effect of MEBDMSBA concentration on reaction rate - Water absorption ratio of the P (U/A/Si)/OMMT nanocomposites |
DOI : |
10.1007/s11998-011-9373-7 |
En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9373-7.pdf |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15963 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 3 (05/2012) . - p. 323-336
[article]
|