Studies on the stability of MF resin solutions: investigations on network formation

Studies on the stability of MF resin solutions: investigations on network formation

The phenomenon of thixotropy of melamine‐formaldehyde (MF) resins has been investigated. A series of MF‐resins with varying F/M ratios, different condensation times and pH during the condensation has been prepared. The storage stability at room temperature was measured using viscosimetry, polarizati...

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Veröffentlicht in:Macromolecular symposia. 2002-05, Vol.181 (1), p.373-382
Hauptverfasser: Mijatovic, Jelena, Binder, Wolfgang H., Kubel, Frank, Kantner, Wolfgang
Format: Artikel
Sprache:eng
Schlagworte:
Condensing
Correlation
Microscopy
Polarization
Polymers
Resins
Storage stability
Thixotropy
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container_issue 1
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container_title Macromolecular symposia.
container_volume 181
creator Mijatovic, Jelena
Binder, Wolfgang H.
Kubel, Frank
Kantner, Wolfgang
description The phenomenon of thixotropy of melamine‐formaldehyde (MF) resins has been investigated. A series of MF‐resins with varying F/M ratios, different condensation times and pH during the condensation has been prepared. The storage stability at room temperature was measured using viscosimetry, polarization microscopy, NMR‐spectroscopy and XRD. The visible changes observed in polarization microscopy (i. e. the formation of micron sized structures) correlate with the increase of viscosity related to the formation of thixotropy. The formation of a transient network can be concluded on basis of nmr‐relaxation measurements and viscosimetry.
doi_str_mv 10.1002/1521-3900(200205)181:1<373::AID-MASY373>3.0.CO;2-J
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source Wiley Online Library Journals Frontfile Complete
subjects Condensing
Correlation
Microscopy
Polarization
Polymers
Resins
Storage stability
Thixotropy
title Studies on the stability of MF resin solutions: investigations on network formation
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