caa a22 4500 463191358 CHVBK 20180406164910.0 cr unu---uuuuu 170326e20070901xx s 000 0 eng 10.1007/s10973-006-7960-0 doi (NATIONALLICENCE)springer-10.1007/s10973-006-7960-0 Effects of CO2 pressure on isotropic transition of amphiphilic side-chain type liquid crystalline di-block copolymers [Elektronische Daten] [T. Yamada, S. Boyer, T. Iyoda, H. Yoshida, J. Grolier] The effects of high pressure carbon dioxide (CO2) on the isotropic transition of three different amphiphilic di-block copolymers, PEOm-b-PMA(Az)n, namely PEO114-b-PMA(Az)40, PEO272-b-PMA(Az)46 and PEO454-b-PMA(Az)47, and on PMA(Az)30 homopolymer have been investigated by scanning transitiometry. Under CO2 pressure, the isotropic transition temperature decreased with the increase of pressure up to around 30 MPa due to CO2 sorption and increased above 40 MPa. Transition entropy of the isotropic transition indicated that the depression of the isotropic transition temperature was caused by the adsorption of CO2 into the azobenzene moieties and that the increase above 40 MPa was caused by the desorption of CO2 into the azobenzene moieties. Comparison between PEOm-b-PMA(Az)n copolymers and PMA(Az) homopolymer clarified PEO domain acted CO2 pathway to approach the equilibrium state rapidly. Springer Science+Business Media LLC, 2007 block copolymer nationallicence carbon dioxide nationallicence liquid crystal nationallicence pressure effect nationallicence transitiometry nationallicence Yamada T. Graduate School of Engineering, Tokyo Metroporitan University, 1-1 Minamiosawa, Hachiouji, 192-0397, Tokyo, Japan aut Boyer S. Graduate School of Engineering, Tokyo Metroporitan University, 1-1 Minamiosawa, Hachiouji, 192-0397, Tokyo, Japan aut Iyoda T. Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, 226-8503, Yokohama, Japan aut Yoshida H. Faculty of Urban Environmental Science, Tokyo Metroporitan University, 1-1 Minamiosawa, Hachiouji, 192-0397, Tokyo, Japan aut Grolier J. Laboratoire de Thermodynamique des Solutions et des Polymères, Université Blaise Pascal, 24 av. des Landais, 63177, Aubière Cedex, France aut Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 89/3(2007-09-01), 717-721 1388-6150 89:3<717 2007 89 10973 https://doi.org/10.1007/s10973-006-7960-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-7960-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yamada T. Graduate School of Engineering, Tokyo Metroporitan University, 1-1 Minamiosawa, Hachiouji, 192-0397, Tokyo, Japan aut NATIONALLICENCE 700 1- Boyer S. Graduate School of Engineering, Tokyo Metroporitan University, 1-1 Minamiosawa, Hachiouji, 192-0397, Tokyo, Japan aut NATIONALLICENCE 700 1- Iyoda T. Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, 226-8503, Yokohama, Japan aut NATIONALLICENCE 700 1- Yoshida H. Faculty of Urban Environmental Science, Tokyo Metroporitan University, 1-1 Minamiosawa, Hachiouji, 192-0397, Tokyo, Japan aut NATIONALLICENCE 700 1- Grolier J. Laboratoire de Thermodynamique des Solutions et des Polymères, Université Blaise Pascal, 24 av. des Landais, 63177, Aubière Cedex, France aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 89/3(2007-09-01), 717-721 1388-6150 89:3<717 2007 89 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer