[article]
| Titre : |
A role of hyper branched polymers in coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Chetan Mothgare, Auteur ; Raut Swapnil, Auteur |
| Année de publication : |
2014 |
| Article en page(s) : |
p. 51-60 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Polymères ramifiés
Revêtements:Peinture
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The hyper branched polymers are more attractive because of their polydispersity and the less perfect globular shape. Unlike conventional polymers, the high number of end groups and their nature participate actively in the physical properties (solubility, glass transition temperature and viscosity) in combination with the backbone structure. This characteristic is exceptional since it leads to the possibility of designing the macromolecule with the combination of many different end groups, thus defining the type of reactive chemistry, properties and applications.
Hyperbranched polymers also have received much attention due to their unique chemical properties as well as their potential applications in coatings, additives, drug and gene delivery, macromolecular building blocks, nanotechnology, and supramolecular science. Hyperbranched polymers can be prepared by means of single monomer methodology (SMM) and double-monomer methodology (DMM). Too many factors have to be considered such as nature of end groups, branching density, flexibility of the repeating units, and in addition, the broad molar mass distribution can obscure specific effects.
Hyper branched and dendritic polymers show low viscosities at high molecular weights. For coating applications, this should be highly interesting in terms of the environmental issues, where legislation plays an important role in the future trend towards coatings with lower VOCs than today. However, favourable viscosity is not the only property to which hyper branched polymers can contribute.
The technology of hyper branched polymers is still new and largely unexplored. Numerous parameters affect physical as well as mechanical and chemical properties. |
| Note de contenu : |
- HISTORY OF HYPERBRANCHED POLYMERS
- SYNTHESIS AND PROPERTIES OF HYPERBRANCHED POLYMER : Structure - Dendritic growth - Perstorp technology - Polymer composition
- STRUCTURE/PROPERTY RELATIONS : Physical properties - Reactivities - Chemical resistance - Thermal properties - Mechanical properties - Molecular design
- APPLICATIONS : High-solids alkyds - Hyperbranched epoxies - Polyurethane dispersions - Hyperbranched acrylates
- FUTURE OF HYPERBRANCHED POLYMERS |
| En ligne : |
https://drive.google.com/file/d/1hLrgaPrYNCn5WFxmJpX8iMBl5mzz4qQ5/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21761 |
in PAINTINDIA > Vol. LXIV, N° 5 (05/2014) . - p. 51-60
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