Heat-resistant polyhydroxyesters were obtained through polycondensation of 2-hydroxypropyl-1,3-bis-ester of sulfoimide saccharin-6-carboxylic acid with some aliphatic diamines. Structures of the synthesized compounds were confirmed by infrared spectroscopy data. Thermal stability was studied by means of differential thermal analysis on a derivatograph of the Paulik-Paulik-Erdei system. Derivatographic studies showed that the synthesized polyhydroxyethers have a high thermal stability which decreases as a length of the aliphatic fragment in their composition increases. X-ray studies went to show that the obtained compounds were amorphous polymers.
The interesterification reaction of the ethyl (I) and isopropyl (II) ethers of sulphoimides of saccharin-5and -6-carboxylic acids with glycerine has been studied. The corresponding 2-hydroxypropyl-1,3-bisesterosulphoimides of saccharin-5-and-6-carboxylic acids have been synthesized. They have been characterized by elemental analysis and method of the IR spectroscopy. It has been elucidated that in use of 10% PbO catalyst per mass of glycerine a yield of purposeful product reaches its greatest value -82 and 85% depending on used saccharin: (-5-) or (-6-).
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