Synthesis and Characterization of 8-Hydroxyquinolone-Melamine-Formaldehde Terpolymers

Abstract

The terpolymer resins have been synthesized by the condensation of
8-hydroxyquinoline (Q) with melamine (M) and formaldehyde (F) in the
presence of 2M HCl as catalyst. Four different types of 8-HQMF terpolymer
resins with different stoichiometry have been synthesized by
taking different molar ratios of 8-hydroxyquinoline : melamine: formaldehyde
as (1 : 1 : 3), (2: 1 : 3), (3: 1 : 5) and (4: 2 : 7). The terpolymer
resins were purified by suitable method. The terpolymers were characterized
by elemental analysis, UV-visible, infrared and ¹H NMR spectral
studies. The number average molecular weights of terpolymers resins have
been determined by conductometric titrations in non-aqueous medium and
vapour pressure osmometry (VPO). Viscometric measurements in
dimethylformamide (DMF) have been carried out in order to ascertain the
characteristic functions and constants of terpolymer resins. The structures
of the terpolymer resins have been established by analytical and  spectral
data.