Synthesis and characterization of poly(dioxynaphthylene-1,4-dicarbonylnaphthylene)s with various isomeric naphthylene links
β Scribed by E-Joon Choi; Wang-Cheol Zin; Jin Chul Jung
- Book ID
- 105016753
- Publisher
- Springer
- Year
- 1995
- Tongue
- English
- Weight
- 457 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0170-0839
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Fully rodlike poly(4,4-biphenylene pyromellitimide) (PMDA-BZ) is so brittle in spite of its extremely high modulus. In this study, the brittleness was attempted to be improved without a significant sacrifice of the high modulus by incorporating short side groups. For this, benzidine monomers, which
New poly(amide-imide)s were prepared from a diimide-dicarboxylic acid, 1,4-bis(4-trimellitimidophenoxy)-2-tert-butylbenzene (BTTB), with various diamines by the direct polycondensation in N-methyl-2-pyrrolidinone (NMP) using triphenyl phosphite and pyridine as condensing agents. The new diimide-dica