| Titre : |
Synthesis and characterization of waterborne polyurethane thickeners based on hyperbranched polyester |
| Type de document : |
texte imprimé |
| Auteurs : |
Andong Xie, Auteur ; Hongxiang Chen, Auteur ; Caixia Xu, Auteur ; Hailun Chen, Auteur ; Yu Zhou, Auteur ; Yinli Lin, Auteur ; Minghua Yang, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 325-331 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Caractérisation
Epaississants
Polymères -- Synthèse
Polymères en émulsion
Polymères ramifiés
Polyuréthanes
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Octahydroxyl-terminated and hexadecahydroxyl-terminated hyperbranched polyesters (HPE-8 and HPE-16) were synthesized from 2,2-dimethylol propionic acid and 1,4-butanediol. The hyperbranched waterborne polyurethane (HWPU) thickeners containing different branching structure and length of hydrophilic chain were prepared with hexamethylene diisocyanate, polyethylene glycol (PEG), cetyl alcohol, and HPE. The structures of HPE and HWPU were characterized by Fourier transform infrared spectra and nuclear magnetic resonance (1H NMR and 13C NMR). The rheological properties of polyurethane emulsion thickened by HWPU were measured using Brookfield LVDV-III rheometer, and the effects of HPE structure and PEG molecular weight on the thickening property of HWPU were studied. The results showed that HWPU with HPE branching number of 8 and PEG molecular weight of 4000 exhibited an excellent thickening effect in the aqueous polyurethane emulsion |
| Note de contenu : |
- EXPERIMENTAL : Materials - Synthesis of HPE-6 and HPE-12 - Synthesis of HWPU-X-Y - Characterization and measurements
- RESULTS AND DISCUSSION : Structural characterization of HPE-8 and HPE-16 - Structural characterization of HWPU - The influence of branching number on the thickening property of HWPU - The influence of PEG molecular weight on the thickening property of HWPU |
| DOI : |
10.1007/s11998-014-9636-1 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9636-1.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23651 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 2 (03/2015) . - p. 325-331
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