Syntheses and thermoanalytical studies of some schiff base polymers derived from 5,5′-methylene bis(2-hydroxyacetophenone)

• Published in: European polymer journal Vol. 34; no. 1; pp. 133 - 135
• Main Authors: Khuhawar, M.Y., Channar, A.H., Shah, S.W.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 1998; Elsevier
• Subjects: Applied sciences; Exact sciences and technology; Organic polymers; Physicochemistry of polymers; Polycondensation; Preparation, kinetics, thermodynamics, mechanism and catalysts; Polycondensation; Acetophenone derivatives; Preparation; Phenols; Schiff base polymer; Experimental study; Thermal stability
• ISSN: 0014-3057; 1873-1945
• DOI: 10.1016/S0014-3057(97)00078-5

Six Schiff base polymers poly 5,5′-methylenebis(2-hydroxyacetophenone)1,2-ethylenediimine (PHAen), poly[5,5′-methylenebis(2-hydroxyacetophenone)1,2-propylenediamine] (PHAPn), poly[5,5′-methylenebis (2-hydroxyacetophenone) 1,3-propyledenediamine] (PHAPR), poly[5,5′-methylenebis(2-hydroxyacetophenone)
dl-stilbenediimine] (
dl-PHAS), poly[5,5′-methylenebis(2-hydroxyacetophenone)-
meso-stilbenediamine] (
meso-PHAS), and poly[5,5′-methylenebis(2-hydroxyacetophenone)azine] (PHAH) have been prepared by polycondensation of 5,5′-methylenebis(2-hydroxyacetophenone (MHA) with ethylenediamine,
dl-stilbenediamine
meso-stilbenediamine or hydrazine. Each of the polymers has been characterized by elemental microanalysis, infrared and ultraviolet spectroscopy. Their thermogravimetry (TG) and differential thermal analysis (DTA) have been recorded and evaluated. The reduced viscosity of the polymers measured in tetrahydrofuran (THF), dimethylformamide (DMF) and dimethyl sulphoxide (DMSO) was found within 0.202–0.505 dl/g.