Premium
Soluble, UV‐fluorescent polyamides and polyimides containing oligophenyls in the main chain and highly phenylated side groups
Author(s) -
Mikroyannidis John A.
Publication year - 1999
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(19991001)200:10<2327::aid-macp2327>3.0.co;2-l
Subject(s) - triphenylmethane , polymer , polymer chemistry , thermal stability , polyamide , solubility , side chain , chemistry , fluorescence , materials science , organic chemistry , physics , quantum mechanics
Starting from pyrylium salts four new aromatic diamines were synthesized and used for the preparation of rigid‐rod polyamides and polyimides. The polymers contain p ‐terphenyl or p ‐quinquephenyl moieties in the backbone and pendent groups, which consist of 1,3,5‐triphenylbenzene or triphenylmethane segments. Most of the polymers show excellent solubility in various common solvents and even in 1,1,2,2‐tetrachloroethane. Polyamides with pendent groups of triphenylmethane possess enhanced hydrophilicity. The solutions of all polymers in DMF show UV‐fluorescence with emission maxima in the range of 350–367 nm. The polymers are amorphous and their T g values range from 250 to 310°C. They display an outstanding thermal stability, i. e., are stable up to 366–411°C and afford char yields of 64–81% at 800°C in N 2 .