Seven Schiff base polymers poly 5, 5′-methylenebis (2-hydroxyacetophenone)
semicarbazone (PHASC), poly-5, 5′-methylenebis (2-hydroxyacetophenone)
thiosemicarbazone (PHATS), poly 6, 6′-methylenebis (2-hydroxynaphthaldehyde) 1, 2-
propylenediimine (PHNPn), poly 6, 6′-methylenebis (2-hydroxynaphthaldehyde) 1, 3-
propylenediimine (PHNPR), poly 6, 6′-methylenebis (2-hydroxy-naphthaldehyde)
thiosemicarbazone (PHNTS), poly 6, 6′-methylenebis (2-hydroxy-naphthaldehyde) urea …

Bifunctional dialdehydes 6, 6-methylenebis (2'-hydroxynaphtha 1 dehyde) and 6, 6-
nethylenebis (naphthaldehyde) were prepared characterised by elemental micro analysis,
IR and UV/Vis spectroscopy. The bifunctional aldehydes, were polymerized with 1, 2-
diaminpropane, Ethylenediamine 1, 3-diaminopropane to form dark colored polymers. The
polymers are only slightly soluble in dimethyl formamide and dimethyl sulphoxide. The
solution properties of the polymers were examined by measuring relative, specific, inherent …