The influence of lixiviates on the thermal degradation of diglycidyl etherof bisphenol A n=0/1,2-diaminecyclohexane studied by dynamic mechanical analysis and thermogravimetry Fourier transform infrared spectroscopy

The influence of the lixiviates originated in a municipal landfill on the t hermal degradation of a polymeric system composed of a diglycidyl ether of bisphenol A (n = 0) and 1,2-diaminecyclohexane was studied by dynamic mecha nical analysis. Storage modulus (E'), loss modulus (E "), and glass transit ion temperature were measured to make a comparative study between the sampl es before and after being exposed to the chemical compounds in the lixiviat e agents. The different data obtained were analyzed to check the resistance of these materials to chemical attack and the possibility of their use as coating materials in plants where those reagents were present. Thermal stab ility of the system diglycidyl ether of bisphenol A/1,2-diaminecyclohexane exposed to the attack of lixiviates has also been studied by thermogravimet ric analysis. A quantitative study of the gases originated during thermal d egradation of the epoxy/diamine system made by infrared spectroscopy. (C) 1 999 John Wiley & Sons, Inc.