SYNTHESIS AND CHARACTERIZATION OF NEW POLYAMIDES CONTAINING 6,6'-METHYLENEDIQUINOLINE UNITS

Aromatic polyamides have been synthesised from a new monomer containin g a 6,6'-methylenediquinoline unit by reaction with various diamines b y the phosphorylation route. The polymers have been characterised by e lemental analysis, infrared, thermogravimetric analysis and differenti al scanning calorimetry. The polyamides, obtained in quantitative yiel d, possessed inherent viscosities in the range 0.20-0.85 dl g(-1), 10% weight loss in nitrogen and air above 420 degrees C and glass transit ion temperatures in the range 184-294 degrees C. The polyamides obtain ed by reaction of this new monomer with 4,4'-oxydianiline and 4,4'-met hylenedianiline were soluble on heating in N-methyl-2-pyrrolidone and partially soluble in dimethylacetamide. The properties of these polyme rs are compared with those of corresponding polyamides having only one quinoline ring per repeat unit. (C) 1998 Elsevier Science Ltd. All ri ghts reserved.