Abstract

L. Sowbagya lakshmi Prabha, R. Nanthini and K. Prabhu

Synthesis of novel aliphatic biodegradable copolyesters namely Poly (ethylene sebacate-co-butylene succinate) and Poly (ethylene sebacate-co-butylene adipate) were carried out using Poly (butylene Succinate), Poly (Butylene Adipate) and Poly (Ethylene Sebacate) in presence of Poly Phosphoric acid. Synthesis of Poly (Butylene Succinate), Poly (Butylene Adipate) and Poly (Ethylene Sebacate) were carried out using respective diols and diacids in presence of titanium tetrabutoxide as catalyst. Newly synthesized copolyesters were characterized by solubility studies, viscosity measurements, thermal analysis, IR Spectroscopy and Nuclear Magnetic Resonance Spectroscopy (1H-NMR and 13C-NMR). The characteristic peaks present in the homopolyesters were recorded in the copolymers as well. DSC analysis of the copolyesters showed multiple melting peaks, while increase of methylene units in the di-acid decreased the Tg.

Aliphatic polyester; polycondensation; Poly(ethylene sebacate-co-butylene succinate); Poly(ethylene sebacate-co-butylene adipate); differential scanning calorimetry; spectral analysis

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