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Polymers containing formamidine groups, 4. Copolyformamidines prepared from triethyl orthoformate, benzidine and various diamines

✍ Scribed by Mailk Rillich; Dieter Jehnichen; Hartmut Komber; Frank Böhme

Book ID: 102941408
Publisher: John Wiley and Sons
Year: 1995
Tongue: English
Weight: 503 KB
Volume: 196
Category: Article
ISSN: 1022-1352
DOI: 10.1002/macp.1995.021960520

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✦ Synopsis

Fully aromatic and aromatic-aliphatic polyformamidines were prepared by high-temperature solution polycondensation of the appropriate diamines with triethyl orthoformate (TEOF). Copolyformamidines of benzidine (4,4'-biphenyldiamine) with p-phenylene and trans-l,4-cyclohexylene units, respectively, showed liquid-crystalline behaviour. Both series of copolyformamidines differ distinctly in crystallinity. This has been discussed with respect to sequence distribution, which was determined by I3C NMR spectroscopy. a) Part 3: cf. ref. 5 ) .

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