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Synthesis and properties of new soluble N-phenyl–substituted aromatic-aliphatic and all aromatic polyamides derived from 4,4′-dianilinobiphenyl

✍ Scribed by Meenakshi Goyal; Masa-aki Kakimoto; Yoshio Imai

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
131 KB
Volume
36
Category
Article
ISSN
0887-624X

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✦ Synopsis

New N-phenylated aromatic-aliphatic and all aromatic polyamides were prepared by the high-temperature solution polycondensation of 4,4Ј-dianilinobiphenyl with both aliphatic (methylene chain lengths of 6 -11) and aromatic dicarboxylic acid chlorides. All of the aromatic-aliphatic polyamides and the wholly aromatic polyamides exhibited an amorphous nature and good solubility in amide-type and chlorinated hydrocarbon solvents, except for those aromatic polyamides containing p-oriented phenylene or biphenylylene linkages in the backbone; the latter were crystalline and insoluble in organic solvents except m-cresol. The N-phenylated aromatic-aliphatic polyamides and aromatic polyamides had glass transition temperatures in the range of 79 -116°C and 207-255°C, respectively, and all the polymers were thermally stable with decomposition temperatures above 400°C in air.

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