Kinetic and thermodynamic studies of an epoxy system diglycidyl ether of bisphenol A/1, 2 diamine cyclohexane/calcium carbonate filler

✍ Scribed by Lisardo Núñez; F. Fraga; A. Castro; M. R. Núñez; M. Villanueva

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 585 KB
• Volume: 75
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(20000110)75:2<291::aid-app12>3.0.co;2-a

✦ Synopsis

The curing reaction of an epoxy system consisting of a diglycidyl ether of bisphenol A (BADGE n ϭ 0) and 1,2-diaminecyclohexane (DCH) with a calcium carbonate filler was studied by differential scanning calorimetry (DSC) and using a scanning electronic microscope (SEM). As a first stage, the optimum content of the filler determined was 20%. From a kinetic study, in which two models were used, parameters such as reaction orders, rate constants, and activation energies were determined. A thermodynamic study allowed calculation of enthalpy (⌬H # ), entropy (⌬S # ), and freeenergy ((⌬G # ) changes. The results were compared to those obtained for the same epoxy systems without the filler.