Synthesis and Characterization of Novel Sulphanilamide/Epoxy Resin Modified Polyester for Thermal Stability and Impact Strength

Abstract

How to cite this paper: Alhousami, M.H.M., et al. (2014) Synthesis and Characterization of Novel Sulphanilamide/Epoxy Resin Modified Polyester for Thermal Stability and Impact Strength. Abstract The synthesis of thermally stable Tetra-di-glycidyl ether bisphenol-A (TDGEBA) Epoxy resin and Sulphanilamide (SAA) have been synthesized from (SAA) and TDGEBA by in situ polymerization technique to obtain Tetra-di-glycidyl ether bisphenol-A Sulphanilamide (TDGEBA/SAA) Epoxy re-sin and modified with various percentages of polyester (PE) to obtain Tetra diglycidyl ether bis-phenol-A Sulphanilamide polyester (TDGEBA/SAA-PE), highly cross-linked thermosetting polymer network. These materials were cured with triethylenetetramine TETA (hardener) to obtain highly cross-linked thermosetting resin. The physical properties of the resulting blends were evaluated by measuring the impact strength of (TDGEBA/SAA-PE) (increased more than 30% than the un-modified epoxy resin) and hardness that is found to be higher than unmodified epoxy resin. Diffe-rential scanning calorimetry (DSC) and thermo gravimetric (TGA) analysis were also cured to as-sess the thermal behavior of the samples. DSC of the (TDGEBA/SAA) Epoxy resin cured with TETA showed exothermic reactions and the glass transition temperature (Tg) shifted from 350˚C to 400˚C compared with uncured epoxy and the thermal stability of the TDGEBA/SAA epoxy resin modified increased with increasing of PE. Scanning Electron Microscopy (SEM) studied the mor-phology of the samples after unnotched impacts on fracture surfaces. These materials exhibited a higher degree of solvent resistance.