High Molecular Weight Polyurethane and Polymer Hybrid Particles in Aqueous Miniemulsion

High Molecular Weight Polyurethane and Polymer Hybrid Particles in Aqueous Miniemulsion

The polycondensation of isophorone diisocyanate (IPDI) with dodecanediol has been performed in aqueous miniemulsion in order to obtain hydrophobic polyurethane dispersions. The influence of several factors, such as temperature, surfactant, and catalyst, on the molecular weight has been studied in de...

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Veröffentlicht in:Macromolecules 2003-07, Vol.36 (14), p.5119-5125
Hauptverfasser: Barrère, Matthieu, Landfester, Katharina
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Sprache:eng
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Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polycondensation
Preparation, kinetics, thermodynamics, mechanism and catalysts
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creator Barrère, Matthieu
Landfester, Katharina
description The polycondensation of isophorone diisocyanate (IPDI) with dodecanediol has been performed in aqueous miniemulsion in order to obtain hydrophobic polyurethane dispersions. The influence of several factors, such as temperature, surfactant, and catalyst, on the molecular weight has been studied in detail. It has been found that the use of hydrophobic organo-tin catalysts, a solvent of the polyaddition medium, or an off-stoichiometric ratio of the isocyanate and the diol component permits to considerably increase the molecular weight of the polymer. It is also shown that hybrid polymer nanoparticles based on polystyrene/polyurethane (PS/PU) or poly(butyl acrylate)/polyurethane (PBA/PU) can been synthesized using a one-pot procedure.
doi_str_mv 10.1021/ma025981+
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subjects Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polycondensation
Preparation, kinetics, thermodynamics, mechanism and catalysts
title High Molecular Weight Polyurethane and Polymer Hybrid Particles in Aqueous Miniemulsion
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