caa a22 4500 465788521 CHVBK 20180323112016.0 cr unu---uuuuu 170327e19900201xx s 000 0 eng 10.1007/BF00338505 doi (NATIONALLICENCE)springer-10.1007/BF00338505 Liquid crystalline polyethers based on conformational isomerism [Elektronische Daten] 9.Synthesis and determination of the virtual mesophases of polyethers based on 1-(4-hydroxyphenyl)-2-(2-methyl-4-hydroxyphenyl) ethane with 1,15-dibromopentadecane and 1,16-dibromohexadecane [V. Percec, Y. Tsuda] Summary: This paper describes the synthesis and characterization of the polyethers based on 1-(4-hydroxyphenyl)-2-(2-methyl-4-hydroxyphenyl) ethane (MBPE) and 1,15-dibromopentadecane (MBPE-15), MBPE and 1,16-dibromohexadecane, and of the copolyethers based on MBPE and 1,8-dibromooctane with 1,15-dibromopentadecane (MBPE-8/15), and with 1,16-dibromohexadecane (MBPE-8/16). MBPE-15 and MBPE-16 are only crystalline while MBPE-8/15 and MBPE-8/16 display a monotropic or even an enantiotropic nematic mesophase. The virtual isotropic-nematic transition temperature of MBPE-15 determined from these copolymers is 62°C (ΔH=2.58 kcal/mru), while the virtual isotropic-nematic transition temperature of MBPE-16 is 73°C (ΔH=3.15 kcal/mru). Springer-Verlag, 1990 Percec V. Department of Macromolecular Science, Case Western Reserve University, 44106, Cleveland, OH, USA aut Tsuda Y. Department of Macromolecular Science, Case Western Reserve University, 44106, Cleveland, OH, USA aut Polymer Bulletin Springer-Verlag 23/2(1990-02-01), 225-232 0170-0839 23:2<225 1990 23 289 https://doi.org/10.1007/BF00338505 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00338505 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Percec V. Department of Macromolecular Science, Case Western Reserve University, 44106, Cleveland, OH, USA aut NATIONALLICENCE 700 1- Tsuda Y. Department of Macromolecular Science, Case Western Reserve University, 44106, Cleveland, OH, USA aut NATIONALLICENCE 773 0- Polymer Bulletin Springer-Verlag 23/2(1990-02-01), 225-232 0170-0839 23:2<225 1990 23 289 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 465167047 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer