Preparation and properties of some cardopolyamides

Abstract

Abstract Several polyamides that contained cardo units were prepared. Thus 9,9‐bis(4‐aminophenyl)fluorene and 9,9‐bis(4‐aminophenyl)anthrone were condensed with 2,5‐dimethyl‐1,4‐benzenediacetyl chloride, 2,4‐dimethyl‐1,4‐benzendiacetyl chloride, and 2,5‐dimethoxy‐1,4‐benzediacetyl chloride. Lowtemperature solution polycondensation in dimethyl acetamide (DMAc) was used throughout. The polymers were obtained in 80–90% yield and possessed intrinisic viscosities in the range of 0.6–1.2. The polymers were characterized by infrared (IR) spectra and elemental analysis. The solubility, crystallinity, and thermal stability of the polyamides were also determined.