caa a22 4500 465787177 CHVBK 20180323112012.0 cr unu---uuuuu 170327e19901001xx s 000 0 eng 10.1007/BF00294089 doi (NATIONALLICENCE)springer-10.1007/BF00294089 Hedrick Jemes IBM Research Division, Almaden Research Center, 650 Harry Road, 95120-6099, San Jose, CA, USA aut Imide-aryl ether benzothiazole copolymers [Elektronische Daten] [Jemes Hedrick] Summary: Imide-aryl ether benzothiazole random copolymers were investigated. A new diamine containing preformed benzothiazole rings was prepared by a thiazole activated nucleophilic aromatic substitution reaction. The synthesis involved the reaction of 2,6-(bis(4-fluorophenyl))benzo[1,2,4,5]bisthiazole with 3-aminophenol in the presence of K 2 CO 3 in N-methylprrolidone (NMP) to afford bis(3-aminophenoxy)phenylbenzo [1,2,4,5]bisthiazole in high yield. This new diamine was readily purified and co-reacted with various compositions of 4,4′-oxydianiline (ODA) and pyromellitic dianhydride (PMDA) producing a series of imide-ary ether benzothiazole random copolymers. Films were cast and cured (350°C) to effect imidization, affording tough films with moduli significantly higher than PMDA/ODA polyimide. The thermal stability of the copolymers was good with thermal decomposition temperatures in the 480 to 510°C range, and the thermal expansion coefficients were lower than PMDA/ODA polymide and in the 25-30 ppm range. Springer-Verlag, 1990 Polymer Bulletin Springer-Verlag 24/4(1990-10-01), 371-377 0170-0839 24:4<371 1990 24 289 https://doi.org/10.1007/BF00294089 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00294089 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Hedrick Jemes IBM Research Division, Almaden Research Center, 650 Harry Road, 95120-6099, San Jose, CA, USA aut NATIONALLICENCE 773 0- Polymer Bulletin Springer-Verlag 24/4(1990-10-01), 371-377 0170-0839 24:4<371 1990 24 289 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer