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Polyelectrolytes based on maleic anhydride copolymers

Abstract : Polyelectrolytes are an important class of polymers which were studied over 3 decades. The field of polyelectrolytes is currently undergoing an amazing explosion of activity in several science domains: chemistry, biology, medicine, physics, nanomaterials, nanotechnologies... The peculiar interest manifested for the polyelectrolytes is due not only to the need for better understanding of their behavior but also to potential commercial applications.
Solubility in water is the most important property of polyelectrolytes, which allows us to obtain multifunctional derivatives with reduced toxicity, environmentally friendly at low cost. One of the new and promising applications of polyelectrolytes is electrostatic self-assembly for the formation of multilayered thin films with a wide range of electrical, magnetic and optical properties. In response to the growing demand for environmentally friendly electronic devices, we designed, synthesized and characterized new highly water-soluble pendant chromophore copolymers based on maleic anhydride. These water soluble derivatives can self-organize from a solution into multilayer films.
The use of maleic anhydride copolymers is attractive because of the variability in their properties achieved through the introduction of different comonomers. Futhermore, these copolymers contain the reactive anhydride unit, which offers possibilities for subsequent chemical modification of the polymer, under mild conditions (low temperatures, without catalists). The nucleophylic reactants used for the functionalization were: Disperse Red 1, 3-amino-ethyl-carbazole, 9-ethanol-9 carbazole, 1-aminopyrene, 2-(4-aminophenyl)-5-(4-biphenylyl)-1,3,4-oxadiazole, 1-aminohexane, 4-aminoazobenzene, 4-nitroaniline and [6,6]-C61-bismethanoic acid ethyl ester 6-hydroxyhexyl ester. These reactions are of great interest because simultaneous with the opening of the anhydride ring apears a carboxylic group which induces the hydrosolubility or the hydrophylicity of the final products. Thus, the maleic acid copolymers can be used as anionic parteners in the electrostatic interaction, known as Layer-by-Layer technique.
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Submitted on : Wednesday, July 4, 2007 - 4:12:10 AM
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  • HAL Id : tel-00159742, version 1

Citation

Gabriela Aldea. Polyelectrolytes based on maleic anhydride copolymers. Material chemistry. Université Technique Gh. Asachi, Iasi, 2005. Romanian. ⟨tel-00159742⟩

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