Kombo, Miza Ali2019-07-162020-01-072019-07-162020-01-072012Kombo, M.A (2012), Synthesis and characterization of polyesters from renewable cardol and cardanol,master dissertation, University of Dar es Salaam (available at http://41.86.178.3/internetserver3.1.2/detail.aspx )http://localhost:8080/xmlui/handle/123456789/1389Available in print formPolyesters from components of Cashew Nut Shell Liquid CNSL, namely cardol and cardanol, have been synthesized. Cardol and a compound synthesized from cardanol, 8-(3-hydroxyphenyl) octanol (HPO), were used as monomers for the synthesis of the polyesters. Ozonolysis of cardanol followed by reduction with sodium borohydride afforded the 8-(3-hydroxyphenyl) octanol (HPO) monomer. The HPO was reacted with diacid chlorides (adipoyl chloride and terephthaloyl chloride) in 1:1 molar ratios in DMF at 170 °C under nitrogen atmosphere to produce the HPO – based polyesters. Good yields of polyesters were obtained after 8 hrs. All the prepared polyesters were insoluble in common laboratory solvents. Cardol was also reacted with diacid chlorides (i.e adipoyl and terephthaloyl chloride) to afford solvent insoluble polyesters. The yield of polymers formed varied from 20.4 to 63.0 % for cardol based polymers and from 23.2 to 56.0 % for HPO based polymers. The prepared polymers were analysed by Fourier Transform Infrared Spectroscopy (FT-IR), Thermogravimetric analysis (TGA) and Differential Scanning Calorimetry (DSC). TGA and DSC results showed that both the cardol based and the HPO based polyesters were thermally stable up to about 400 °C. Apparently the cardol – terephthaloyl chloride polyesters showed higher thermal stability than the cardol – adipoyl chloride polyesters while the HPO – terephthaloyl chloride polyesters showed higher thermal stability compared to the HPO – adipoyl chloride polyesters. Furthermore, the cardol based polyesters were observed to offer better thermal stability compared to the HPO based polyesters at lower temperatures.enPolyestersCashewnut shell liquidThesis