Mechanical Properties of new Composite Unsaturated Polyesters Based on Nano Fillers for Marine application

Abstract

Monomers of phathalic acid mono-(4-carboxy-phenyl) ester (AC1) and But-2-enedioic acid mono (2-carboxy-phenyl) ester (AC2) were synthesized from phathalic anhydride with p-hydroxy benzoic acid and maleic anhydride with salicylic acid, respectively. The new unsaturated polyester resins were made through condensation reaction between the dicarboxylic acid and polyols in the presence of p-Toluene sulphonic acid as catalyst. In addition, solubility of prepared unsaturated polyesters was measured and the solubility of its was good in a polar protic solvents such as DMSO, CH2Cl2, THF, DMF, acetone and some non-polar solvents such as Benzene and CH3Cl, while it was a little solubility in both H2SO4 and HCl. The chemical structures of these monomers and new unsaturated polyesters were confirmed by FTIR, 1HNMR. Thermal analysis of polyesters by thermo gravimetric analysis (TGA) reveals that these Aromatic polyesters possess thermal stability, differential scanning calorimetry (DSC). Carbon Nano and Nano TiO2 reinforced polyester composites. The mechanical properties (tensile strength, elongation at break and hardness) were studied.