Solubility and diffusion coefficient of carbon dioxide in biodegradable polymers

Citation
Y. Sato et al., Solubility and diffusion coefficient of carbon dioxide in biodegradable polymers, IND ENG RES, 39(12), 2000, pp. 4813-4819
Citations number
29
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemical Engineering
Journal title
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN journal
0888-5885 → ACNP
Volume
39
Issue
12
Year of publication
2000
Pages
4813 - 4819
Database
ISI
SICI code
0888-5885(200012)39:12<4813:SADCOC>2.0.ZU;2-O
Abstract
The solubility and diffusion coefficient of carbon dioxide in the biodegrad able polymers poly(butylene succinate) and poly(butylene succinate-co-adipa te) were measured at temperatures from 323.15 to 453.15 K and pressures up to 20 MPa. The solubilities iii the polymer's molten state increased linear ly with pressure and decreased with temperature. Solubilities could be corr elated to within 2.2% by the Sanchez-Lacombe equation of state in conjuncti on with a temperature-dependent interaction parameter. The Sanchez-Lacombe equation of state was also found to be applicable to the correlation of sol ubilities in the semicrystalline state. The interaction parameter determine d from fitting the solubility was inversely proportional to temperature. Th e diffusion coefficients of carbon dioxide showed a weak concentration depe ndence and had an order of magnitude of 10(-9) m(2)/s in the molten state. The diffusion coefficients were correlated with the free-volume model of Ku lkarni and Stern.