SYNTHESIS AND CHARACTERIZATION OF POLY ESTER AMIDE URETHANE DERIVED FROM JATHROPHA CURCAS SEED OIL FROM NIGERIA

B. A. Ikyenge, I. G. Agbidye, S. O. Ameh

Abstract


Poly ester amides are synthetic polymers that combine the thermal and mechanical properties of polyamides as well as biocompatibility and biodegradability of polyesters and hence are used in many fields. Their modification with polyisocyanates in surface coating formulations improved their performances due to unusual capacity of the polymer chains to align themselves to give maximum hydrogen bonding. In this research, Jathropha curcas seed oil was extracted from the seed bearing oil using hot extraction method involving the use of Soxhlet apparatus. Physicochemical properties of the oil viz; specific gravity, refractive index, acid, iodine, and saponification values were determined. N,N-bis (2-hydroxyl ethyl) fatty amide was obtained from the oil by reacting the oil with diethanol amine at 120oC, followed by reaction with phthalic anhydride at 140-150oC to give poly ester amide. The poly ester amide was modified by reacting with 2, 4-diisocyanate under N2 atmosphere at 120oC, in which the diisocyanate groups reacted with the hydroxyl groups of the poly ester amide to form the urethane moieties, thus resulting to poly ester amide urethane. Physicochemical characterization, Fourier transform infrared spectroscopy and thermo-gravimetric analysis were carried out on both the unmodified and modified poly ester amide. Findings revealed that Jathropha curcas seed oil is semi-drying; suitable for the synthesis of oleo chemicals and that the performances of the poly ester amide was enhanced in terms of drying times and thermal stability upon modification with toluene-2, 4- diisocyanate.  


Keywords: Jathropha curcas, Fatty polyamide, poly ester amide, urethane.


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Chemical Society of Nigeria