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Thermal behaviour of melamine

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Abstract

Melamine undergoes condensation on heating with elimination of ammonia and formation of insoluble products. Thermogravimetry and infrared characterisation show that two products of successive condensation can be reproducibly obtained upon heating atT}<500 °C and then at 600 °C. Above 620 °C, the melamine condensate undergoes thermal degradation with quantitative formation of volatile products.

Zusammenfassung

Melanin geht beim Erhitzen eine Kondensation unter Abgabe von Ammoniak und Bildung unlöslicher Produkte ein. Durch Thermogravimetrie und Infrarotspektroskopie wird gezeigt, daß beim Erhitzen zwei Produkte von aufeinanderfolgenden Kondensationsreaktionen beiT}<500 °C undT= 600 °C reproduzierbar erhalten werden. Oberhalb 620 °C wird das Melaminkondensat vollständig unter Bildung flüchtiger Produkte thermisch zersetzt.

Резюме

Меламин при нагреван ии подвергается конденсации с выделе нием аммиака и образованием нераст воримых продуктов. Термогравиметричес кий и ИК спектроскопи ческий анализы показали, что. в результате последо вательной конденсации всегда п олучаются два продукта, один из кото рых при нагревании до температуры ниже 500°, а второй — при температуре 600°. Выше 620° конденсат подвергае тся термическому распад у с количественным образованием летучи х продуктов.

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Additional information

The authors wish to thank Dr. N. Del Fanti of Mantefluos, Italy for most helpful discussion.

This work has been supported by the Consiglio Nazionale delle Ricerche through the Progetto Finalizzato Chimica Fine e Secondaria.

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Costa, L., Camino, G. Thermal behaviour of melamine. Journal of Thermal Analysis 34, 423–429 (1988). https://doi.org/10.1007/BF01913181

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  • DOI: https://doi.org/10.1007/BF01913181

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