Synthesis and Characterization of Short Alkyd Resin Based on Sesame Seed Oil as Binder for Coating Industry
Kalu M. Kalu
*
Department of Chemistry, Gombe state University, P.M.B 127, Tudun Wada, Gombe, Gombe State, Nigeria.
Adam Aliyu
Department of Chemistry, College of Education, Zing, Taraba State, Nigeria.
Emmanuel K. Chinedu
Department of Chemistry, Modibbo Adama University, Yola, Adamawa State, Nigeria.
Nnaneme F. O.
Department of Chemistry, Nnamdi Azikiwe University, Awka, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
Alkyd resin of 40 % oil length was synthesized from the polyesterification reaction of glycerol, pthalic anhydride and sesame seed oil. Physicochemical properties such as iodine value, saponification value, density, moisture absorption, acid value and viscosity were determined to be 70.2 gI2/100g, 227.5 mgKOH/100g, 0.953 g/cm3, 0.22%, 9.23 KOH/g and 123.22 m.Pa.s respectively for the sesamum indicum seed oil modified alkyd resin (SISOMAR). Differential scanning calorimetry and thermogravimetric analysis were employed for the characterization of the alkyd resin. The glass transition (Tg) value of the 40% alkyd resin was 34.99 °C, initial degradation temperature (Ti), final degradation temperature (Tf) were 300 °C and > 500 °C respectively. It was identified that the SISOMAR could meet with temperature resistance and mechanical requirements to serve as a potential binder for the coating industry.
Keywords: Alkyd resin, sesame, alcoholysis, polyesterification