Abstract
AbstractThe chemical microstructure of arylene–ether–ketone copolymers of terephthaloyl chloride (TCl), 1,4‐diphenoxybenzene (DPB), and diphenyl ether (DPE) has been characterized by 13C‐NMR. Copolymers synthesized via two Friedel–Crafts reaction have been investigated; the first reaction uses HF and BF3 to catalyze polymerization, and the second uses LiCl to moderate the activity of the Lewis‐acid catalyst, AlCl3. The HF/BF3 approach results in random copolymers, in which the TCI displays no preference in reacting with either DPB or DPE. The buffered AlCl3 approach yields somewhat blocky copolymers, in which the DPB and DPE tend to segregate. The degree of segregation in these materials has been quantified by formulas for the number‐average block lengths.
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