| Titre : |
Synthesis, photopolymerization kinetics, and thermal properties of UV-curable waterborne hyperbranched polyurethane acrylate dispersions |
| Type de document : |
texte imprimé |
| Auteurs : |
Wenhua Yin, Auteur ; Xingrong Zeng, Auteur ; Hongqiang Li, Auteur ; Youjun Hou, Auteur ; Qiongzhi Gao, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 577-584 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Acrylates Les monomères acrylates sont un groupe d'esters faisant partie des vinyles, car renfermant une double liaison carbone-carbone et sont utilisés pour former des polyacryliques qui ont de multiples usages.
Cinétique chimique
Fourier, Spectroscopie infrarouge à transformée de
Photoréticulation
Polymères ramifiés
Polyuréthanes
Réticulation (polymérisation)
Revêtements en phase aqueuse:Peinture en phase aqueuse
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A series of UV-curable waterborne hyperbranched polyurethane acrylate dispersions (WHBPUADs) were prepared via a three-step procedure based on isophorone diisocyanate (IPDI), hyperbranched polyester (HBP), maleic anhydride (MA), and hydroxy-ethyl acrylate (HEA). The structure of WHBPUADs was characterized by Fourier transform infrared spectroscopy (FTIR) and 1H nuclear magnetic resonance spectroscopy (1H NMR). FTIR was also applied to research the effect of double bond concentration on the kinetics of photopolymerization. The heat resistance of the cured films was characterized by thermogravimetric analysis (TGA), and their mechanical properties were also measured. The results showed that the double bond conversion (τ) and photopolymerization rate (R p) were affected by the concentration of double bond and viscosity of WHBPUADs. The UV-curable systems with higher double bond concentration and lower viscosity led to higher τ and R p. The maximum τ and R p reached 93% and 71 mmol g−1 s−1, respectively. The WHBPUADs films possessed better heat resistance and mechanical properties, and with the increase of crosslink density, the heat resistance and hardnesses were further improved. |
| Note de contenu : |
EXPERIMENTAL : Materials - Synthesis of WHBPUADs
RESULTS AND DISCUSSION : FTIR of WHBPUAD - 1H NMR spectrum of WHBPUAD - Photopolymerization kinetics - Film mechanical properties of WHBPUADs - TGA of cured films of WHBPUADs |
| DOI : |
10.1007/s11998-011-9338-x |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9338-x.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12233 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 5 (10/2011) . - p. 577-584
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