A series of organo-soluble hairy-rod polyimides was recently synthesized from 3,3ะ,4,4ะ-biphenyltetracarboxylic dianhydride (BPDA) and di[n-alkyl]-4,4ะ-diamino-6,6ะ-dibromo-2,2ะ-biphenyldicarboxylate with side chains of varying lengths (the numbers of methylene units), BACBP(n). Dynamic mechanical (
โฆ LIBER โฆ
Phase and structural transitions on heating or monoaxial deformation of rigid- and semirigid-chain polymers
โ Scribed by A. T. Kalashnik; S. P. Papkov
- Book ID
- 104818733
- Publisher
- Springer US
- Year
- 1986
- Tongue
- English
- Weight
- 263 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0015-0541
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Nevertheless, this sequence does not represent a case of thermodynamic equilibrium. The K O and K T (s) phases in PEFBP(n = 9 and 11)s and the S A phase in PEBFP(n = 8 and 10)s are characteristics of the evenodd effect observed in this series of combined LC polyesters. The number of methylene units