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Issue 5, 2013
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Homogeneous isocyanate- and catalyst-free synthesis of polyurethanes in aqueous media

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Abstract

We report an efficient and environmentally-friendly method of synthesizing polyurethanes in aqueous solution via an isocyanate- and catalyst-free polymerization process. Five different polyurethanes were synthesized by first activating 1,6-hexanediol and poly(ethylene glycol) with bis(pentafluorophenyl)carbonate, and then polycondensing various ratios of the 1,6-hexanediol/poly(ethylene glycol)-derived activated carbonates with JEFFAMINE. The polymerization process was confirmed by FTIR spectroscopy, 1H NMR spectroscopy, and gel permeation chromatography (GPC). The melting temperature was linearly dependent on the 1,6-hexanediol/poly(ethylene glycol) ratio, increasing with greater poly(ethylene glycol) content, as confirmed by differential scanning calorimetry (DSC). Similarly, the degree of crystallinity was also directly proportional to the poly(ethylene glycol) content.

Graphical abstract: Homogeneous isocyanate- and catalyst-free synthesis of polyurethanes in aqueous media

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Publication details

The article was received on 14 Feb 2013, accepted on 18 Mar 2013 and first published on 18 Mar 2013


Article type: Communication
DOI: 10.1039/C3GC40319J
Green Chem., 2013,15, 1121-1126

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    Homogeneous isocyanate- and catalyst-free synthesis of polyurethanes in aqueous media

    H. Sardon, A. C. Engler, J. M. W. Chan, D. J. Coady, J. M. O'Brien, D. Mecerreyes, Y. Y. Yang and J. L. Hedrick, Green Chem., 2013, 15, 1121
    DOI: 10.1039/C3GC40319J

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