“…At 100 °C, the presence of strong absorbance bands at 3450 and 3515 cm –1 corresponding to a considerable number of primary amino functional groups is another indicator of the uncompleted reaction between cyanuric chloride and melamine. The reaction between unreacted chlorine atoms of cyanuric chloride segments and water resulted in hydroxyl groups. , The absorbance bands at 3450 and 3515 cm –1 , therefore, are related to hydroxyl, as well as primary and secondary amino functional groups. In the IR spectrum of TF Pd400 , however, this band was very weak.…”