Effects of diffusion on the kinetic study of the system BADGE n = 0/m-xylylenediamine

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

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 242 KB
• Volume: 74
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19991213)74:12<2997::aid-app27>3.0.co;2-5

✦ Synopsis

The curing reactions of an epoxy system composed of a diglycidyl ether of bisphenol A (BADGE nϭ0) and m-xylylenediamine (m-XDA) were studied. Two models, the first based solely on chemical kinetics and the second accounting for diffusion, were used and compared to the experimental data. The epoxy resin was used as received in a first series of experiments. In a second series of experiments, the resin was purified in vacuo (180°C and 1 mmHg). The inclusion of a diffusion factor in the second model allowed for the cure kinetics to be predicted over the whole range of conversion covering both pre-and postvitrification stages. The investigation was made in the temperature range 50 -110°C, which is considered optimum for the isothermal curing of the epoxy system studied.