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Preparation of aqueous anionic poly(urethane-urea) dispersions. Influence of the structure and molecular weight of the macrodiol on the dispersion and polymer properties

Durrieu, Vanessa and Gandini, Alessandro Preparation of aqueous anionic poly(urethane-urea) dispersions. Influence of the structure and molecular weight of the macrodiol on the dispersion and polymer properties. (2005) Polymer International, 54 (9). 1280-1287. ISSN 0959-8103

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Official URL: https://doi.org/10.1002/pi.1844

Abstract

Aqueous poly(urethane‐urea) dispersions were prepared by the prepolymer mixing technique, without any organic solvent, using two aliphatic diisocyanates (α,α,α′,α′‐tetramethyl‐1,3‐xylylene diisocyanate and isophorone diisocyanate) and various macrodiols, in conjunction with a fixed proportion of emulsifying agent (dimethylol propionic acid, neutralised with triethylamine) and the same chain extender (1,2‐ethylene diamine). The properties of both the dispersions and the dried polymer films were characterised as a function of the two main parameters studied in this investigation, viz the structure of the macrodiols and their molecular weight, in order to establish criteria leading to optimised performances in terms of dispersion stability, particle size, and polymer film properties.

Item Type:Article
Audience (journal):International peer-reviewed journal
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Institution:Other partners > Institut polytechnique de Grenoble (FRANCE)
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Deposited By: Yves MOMBOISSE
Deposited On:25 Apr 2019 06:24

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