caa a22 4500 465786812 CHVBK 20180323112011.0 cr unu---uuuuu 170327e19900701xx s 000 0 eng 10.1007/BF00298315 doi (NATIONALLICENCE)springer-10.1007/BF00298315 Liquid crystalline polyethers based on conformational isomerism [Elektronische Daten] 13. Copolyethers based on 1-(4-hydroxyphenyl)-2-(2-methyl-4-hydroxyphenyl)ethane, 1,8-dibromooctane and nonmesogenic bisphenols [V. Percec, Y. Tsuda] Summary: The synthesis and characterization of copolyethers based on 1-(4-hydroxyphenyl)-2-(2-methyl-4-hydroxyphenyl)ethane (MBPE), 1,8-dibromooctane and each of the following three nonmesogenic bisphenols: 3,4′-dihydroxydiphenylmethane (3,4′-BPM), 4,4′-isopropylidenediphenol (4,4′-BPA) and 3,4′-isopropylidenediphenol (3,4′-BPA) are presented. Copolymers based on MBPE, 3,4′-BPM and 1,8-dibromooctane display a nematic mesophase up to compositions containing as much as 70 mol% of 3,4′-BPM. The range of mesomorphism decreases on going from 3,4′-BPM to 3,4′-BPA and to 4,4′-BPA. These results demonstrate that structural units derived from parent amorphous and liquid crystalline homopolymers can be isomorphous within the mesophase over a certain range of copolymer composition of the resulting copolymers. Subsequently, the parameters of the mesomorphic phase transitions of these copolymers represent weight averaged values of the corresponding parameters of the parent homopolymers. 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 24/1(1990-07-01), 9-16 0170-0839 24:1<9 1990 24 289 https://doi.org/10.1007/BF00298315 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00298315 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 24/1(1990-07-01), 9-16 0170-0839 24:1<9 1990 24 289 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer