Abstract:

The migration behavior of bisphenol A monomer from polycarbonate plastic container to ethanol solution at
various concentrations was studied at 75, 60, 40 and 20 ℃. The diffusion coefficients were calculated. The polymer specific
Ap-values were also estimated. The results showed that the migration of bisphenol A increased with an increase in ethanol
concentration at the same heating time and temperature, and was positively related to contact time and temperature at the
same ethanol concentration. The diffusion coefficient DP of bisphenol A in different solvent media followed the decreasing
order: 95% ethanol, 65% ethanol, 15% ethanol, and distilled water. According to the DP, the polycarbonate specific Ap-values
were estimated in the range of -1.02 to 7.54.

Key words: polycarbonate, diffusion coefficient, bisphenol A, ethanol, migration