Synthesis and Characterization of Newly Schiff Base Polymers of 4, 4’- Methylene Bis (Cinnamaldehyde) With Urea and 1,2-Phenylenediamine

Abstract

Dialdehyde Methylene Bis (Cinnamaldehyde) (MBC) and Schiff base polymers was synthesized by polycondensation reaction with urea and 1,2-phenylenediamine in acidic media and was characterized by C. H. N elemental analysis, UV/Vis spectroscopic techniques, thermal analysis and viscosity measurements. The synthesized Schiff base polymers indicated better thermal stability up to 700ºC than dialdehyde (MBC). The dialdehyde (MBC) and its derived polymers were soluble in tetrahydrofuran (THF), dimethylformamide (DMF), dimethylacetamide (DMAc) and dimethyl sulphoxide (DMSO). The intrinsic viscosities ranged within 0.276-0.316 dL/g for (PMBCUR) and 0.264- 0.324 dL/g for (PMBCPh) as compared to 0.174-0.249 dL/g for dialdehyde in THF.