Dimethylformamide → Terephthaloyl chloride

Participants

Reaction Steps

The bis-ester of Example 7 (3.9699 g, 0.079 mole) and terephthaloyl chloride (1.5836 g, 0.0078 mole) were polymerized by the procedure of Example 4. The amounts of aluminum chloride and DMF used were 9.19 g (0.0689 mole) and 2.40 mL (0.0312 mole), respectively. The polymer of the repeat unit ##STR24## was obtained as a pale cream powder in 98% yield. It was insoluble in a variety of solvents, including DMAc-lithium chloride (3%), o-chlorophenol, chloroform, and DMSO. It was soluble in concentrated sulfuric acid, but apparently with cleavage of the ester bonds, as the measured RV was only 0.07. DSC showed a possible Tg at 161° C. TGA in air showed a 1% weight loss at 380° C.

Provenance & Evidence