Record number :
Title of article :
Measurement of CO2 solubility and diffusivity in poly(l-lactide) and poly(d,l-lactide-co-glycolide) by magnetic suspension balance
Author/Authors :
Aionicesei، نويسنده , , Elena and ?kerget، نويسنده , , Mojca and Knez، نويسنده , , ?eljko، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Pages :
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Abstract :
The solubility of supercritical carbon dioxide (scCO2) in poly(l-lactide) and poly(d,l-lactide-co-glycolide) at different temperatures (308, 313 and 323 K) and pressures (10–30 MPa) was measured using a magnetic suspension balance. The solubility data were also used for estimating the binary diffusion coefficients. The results show a good solubility of CO2 in both polymers: up to 43% in poly(l-lactide) and 30% in poly(d,l-lactide-co-glycolide). The diffusion coefficients have high values, which verify the liquid-like solvating properties of scCO2. The diffusion coefficient depends on the quantity of gas already absorbed by the polymer; its values decrease with increasing gas concentration.
Keywords :
Supercritical carbon dioxide , solubility , Magnetic suspension balance , Diffusivity
Journal title :
Journal of Supercritical Fluids
Serial Year :
Link To Document :