Solubility on tetrahydrofurfuryl acrylate effect for the poly [tetrahydrofurfuryl acrylate] in supercritical carbon dioxide and dimethyl ether

초록

In this work, the phase behavior for a binary and ternary mixture of polymer with a tetrahydrofurfuryl acrylate (THFA) repeating unit in supercritical conditions were investigated experimentally and theoretically. High-pressure solubility data for the THFA in supercritical carbon dioxide (CO2) fluid were presented over a broad temperature range from 313.2 K to 393.2 K and up to a pressure of 21.86 MPa. The cloud-point measurements in binary and ternary mixtures for poly(tetrahydrofurfuryl acrylate) [PTHFA] + THFA or dimethyl ether (DME) in supercritical CO2 were carried out up to 456.2 K and 255.34 MPa. When THFA and DME were added as co-solvents the cloud-point for PTHFA + CO2 fluid shifted a lower pressure. The PC-SAFT model was applied to describe the phase behavior for all experimental results, which were adequately modeled. Through theoretical investigation with the PC-SAFT model, it was found that the strong interaction between polymer and CO2 causes wide one fluid for the PTHFA/CO2/THFA system, and the interactions between CO2 and DME molecules have strong effects on the phase behavior for the PTHFA/CO2/DME system.

키워드