| Titre : |
Synthesis and characterization of UV-curing epoxy acrylate coatings modified with organically modified rectorite |
| Type de document : |
texte imprimé |
| Auteurs : |
Ying Wang, Auteur ; Zhichao Cao, Auteur ; Fengguo Liu, Auteur ; Xiangxin Xue, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 107-115 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Analyse mécanique dynamique
Copolymère époxy acrylate
Matériaux hybrides -- Propriétés mécaniques
Morphologie (matériaux)
RectoriteLa Rectorite (ou "papier de montagne" ou "allevardite") est un minéral des argiles.
C’est un monoclinique constitué d’une interstratification régulière de deux phyllosilicates : le mica et la smectite
Formule chimique : (Na,Ca)Al4(Si,Al)8O20(OH)4 • 2 H2O
Revêtements -- Séchage sous rayonnement ultraviolet:Peinture -- Séchage sous rayonnement ultraviolet
Thermogravimétrie
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Epoxy acrylate (EA) coatings modified with organically modified rectorite (OREC) were synthesized employing the ultraviolet-curing technique. Two kinds of alkyl ammonium ions, octadecyltrimethylammonium chloride (OTAC) and [2-(methacryloyloxy)ethyl]trimethylammonium chloride (MAOTMA), were used to modify rectorite (REC). The methacrylate functionalities of MAOTMA were capable of reacting with the acrylate groups of EA. The structure of OREC was characterized by FTIR and XRD and the results indicated that the surfactants were successfully intercalated into the REC interlayers via cation exchange process. The morphology of nanocomposites was investigated by SEM and TEM. OREC showed better dispersion in EA matrix compared with unmodified REC. The Tg of neat EA obtained by DMA was 75.6°C, while for 5 wt% EA/MAOTMA-REC and EA/OTAC-REC nanocomposites it increased to 76.5 and 80.8°C, respectively. The nanocomposite with 3 wt% loading of OTAC-REC had the highest Tg (89.7°C). TGA revealed that the thermal stability of nanocomposites was enhanced by OTAC-REC and MAOTMA-REC and the thermal stability of EA/MAOTMA-REC nanocomposites was better than that of EA/OTAC-REC nanocomposites. The mechanical properties of nanocomposites containing OTAC-REC and MAOTMA-REC were better than those of nanocomposites containing unmodified REC. With increasing OREC content, the adhesive force of nanocomposites decreased slightly and the flexibility increased significantly. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Clay modification - Preparation of nanocomposite coatings - Characterizations
- RESULTS AND DISCUSSION : Modification of the rectorite - Morphological analysis - Dynamic mechanical analysis (DMA) - Thermal gravimetric analysis (TGA) - Mechanical properties |
| DOI : |
10.1007/s11998-016-9832-2 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9832-2.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27793 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 1 (01/2017) . - p. 107-115
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