|
|||||
|
|
Isotropictransition behaviour of an amphiphilic di-block copolymer under pressure |
|
| Authors: | S. A. E. Boyer J-P. E. Grolier L. Pison C. Iwamoto H. Yoshida T. Iyoda |
| Affiliation: | (1) Department of Applied Chemistry, Graduate School of Engineering, Tokyo Metropolitan University (TMU), Hachiouji-Shi, Tokyo, Japan;(2) Laboratory of Thermodynamics of Solutions and Polymers (LTSP), Blaise Pascal University, Clermont-Ferrand, France;(3) Department of Applied Chemistry, Faculty of Urban Environmental Sciences, Tokyo Metropolitan University (TMU), Hachiouji-Shi, Tokyo, Japan;(4) Chemical Resources Laboratory, Tokyo Institute of Technology (TIT), Midori-Ku, Yokohama, Japan |
| Abstract: | The present work deals with the interactions between carbon dioxide, used as pressure medium, either in the gas state (GCO2) or in the supercritical state (SCCO2) and amphiphilic di-block copolymers PEOm-b-PMA(Az)n. The effect of pressure on the isotropic transition of the PEOm-b-PMA(Az)n copolymer was investigated using scanning transitiometry (ST). The experimental results were compared with those measured when using ‘relatively inert’ mercury (Hg) as pressure medium. Morphological observation of a PEOm-b-PMA(Az)n thin film submitted to SCCO2 was performed by atomic force microscopy (AFM) to investigate the nano-structure organization. These results indicate the possibility of modifying the nano-structure in a specific way depending on the CO2 physical state. |
| Keywords: | amphiphilic di-block copolymers calorimetric-pVT measurements interactions supercritical carbon dioxide |
| 本文献已被 SpringerLink 等数据库收录！ | |