Abstract
The relationship of the thermal stabilities of some polymeric Schiff-bases to their chemical structures was studied by using thermogravimetric analysis and differential thermal analysis. Polymeric Schiff-bases were prepared by the condensation of 5,5′-methylene-bis-salicylaldehyde, terephthalaldehyde, di( p-formylphenyl) terephthalate or di( p-acetylphenyl) terephthalate with various diamines containing sulphur, such as thiocarbohydrazide, bis (4-aminophenyl) sulphone, 4,4′-diaminostilbene-2,2′-disulphonic acid and 3,5-diaminobenzene sulphonic acid. Two monomeric prototypes of these polymeric Schiff-bases were prepared in order to compare their thermal stabilities with the corresponding polymers.
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