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Optically active poly(amide–imide)s containing axially dissymmetric 1,1′-binaphthyl moieties

✍ Scribed by Naiheng Song; Lianxun Gao; Mengxian Ding

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
184 KB
Volume
37
Category
Article
ISSN
0887-624X

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✦ Synopsis

Novel optically active aromatic poly(amide-imide)s (PAIs) were prepared from newly synthesized 2,2Ј-bis(3,4-dicarboxybenzamido)-1,1Ј-binaphthyl dianhydride ((ϩ)-, (S)-, and (R)-BNDADA). PAIs based on dianhydride monomers with different ee % were investigated with respect to their structures and chiroptical properties. These polymers were highly soluble in polar aprotic solvents such as N,N-dimethylacetamide, N-methyl-2-pyrrolidone, pyridine, etc., and showed high glass transition temperatures of 287-290°C and 5% weight loss temperatures of 450 -465°C in nitrogen. Optically active PAIs exhibited high specific rotations, excellent optical stabilities, and a dependence of optical activities on temperature. Investigations on chiroptical properties indicated that chiral conformation was possessed by optically active PAIs.

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