Measurement and prediction of diffusion coefficients of supercritical CO 2  in molten polymers | Zendy

Areerat Surat | Zendy; Funami Eita | Zendy; Hayata Yusuke | Zendy; Nakagawa Dai | Zendy; Ohshima Masahiro | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Premium

Measurement and prediction of diffusion coefficients of supercritical CO 2 in molten polymers

Author(s) -

Areerat Surat,

Funami Eita,

Hayata Yusuke,

Nakagawa Dai,

Ohshima Masahiro

Publication year - 2004

Publication title -

polymer engineering and science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.503

H-Index - 111

eISSN - 1548-2634

pISSN - 0032-3888

DOI - 10.1002/pen.20194

Subject(s) - high density polyethylene , materials science , supercritical fluid , solubility , polymer , low density polyethylene , thermodynamics , polyethylene , diffusion , polypropylene , gravimetric analysis , volume (thermodynamics) , polystyrene , polymer chemistry , thermal diffusivity , gaseous diffusion , sorption , chemistry , organic chemistry , composite material , adsorption , physics , electrode

The solubility and diffusivity of supercritical carbon dioxide (sc‐CO 2 ) in low‐density polyethylene (LDPE), high‐density polyethylene (HDPE), polypropylene (PP), ethylene‐ethylacrylate copolymer (EEA) and polystyrene (PS) were measured at temperatures from 150°C to 200°C and pressures up to 12 MPa by using the Magnetic Suspension Balance (MSB), a gravimetric technique for gas sorption measurements. The solubility of CO 2 in each polymer was expressed by Henry's constant. The interaction parameter between CO 2 and polymer could be obtained from the solubility data, and it was used to estimate the Pressure‐Volume‐Temperature relationship and the specific free volume of polymer/CO 2 mixtures. The diffusion coefficients were also measured by the MSB for each polymer. The resulting diffusion coefficients were correlated with the estimated free volume of polymer/CO 2 mixture. Combining Fujita's and Maeda and Paul's diffusion models, a model was newly developed in order to predict diffusion coefficients for the polymers studied. Polym. Eng. Sci. 44:1915–1924, 2004. © 2004 Society of Plastics Engineers.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here

Accelerating Research