Abstract
The solubility of CO 2 in saturated polyester resins at different temperatures (306 and 343 K) and pressures (0.1–30 MPa) has been measured using a magnetic suspension balance. The solubility data were used for estimating the binary diffusion coefficients. The results show a good solubility of CO 2 in polymers, up to 0.64 g CO 2/g polymer. The diffusion coefficients of supercritical CO 2 in polymers have generally high values and are in the range from 0.156 × 10 −8 to 10.38 × 10 −8 cm 2/s. DSC and XRD analyses of the semi-crystalline polymer samples indicate that amorphous degree of polymers after exposure to CO 2 is increased. The observed structural effects are dependent on pressure, temperature and time of exposure to CO 2.
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