The effect of high intensity ultrasound on the synthesis of some polyurethanes

The effect of high intensity ultrasound on the synthesis of some polyurethanes

High intensity ultrasound has been applied to the preparation of polyurethanes from a number of diisocyanates and diols. In all cases, the sonochemical reactions proceeded faster in the early stages and led to higher molecular weight polymers. The effect of changing the ultrasound intensity is discu...

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Veröffentlicht in:European Polymer Journal 2002-08, Vol.38 (8), p.1531-1536
Hauptverfasser: Price, Gareth J., Lenz, Emma J., Ansell, Christopher W. G.
Format: Artikel
Sprache:eng
Schlagworte:
Cavitation
Diffusion
Infrared spectroscopy
Mass transfer
Molecular weight
Polymerization
Polyurethanes
Sonochemistry
Synthesis (chemical)
Ultrasonic effects
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Zusammenfassung:High intensity ultrasound has been applied to the preparation of polyurethanes from a number of diisocyanates and diols. In all cases, the sonochemical reactions proceeded faster in the early stages and led to higher molecular weight polymers. The effect of changing the ultrasound intensity is discussed and some speculation as to the mechanism of the reaction enhancement is given. © 2002 Elsevier Science Ltd. All rights reserved.
ISSN:0014-3057
1873-1945
DOI:10.1016/S0014-3057(02)00039-3