Synthesis and characterization of some aromatic polyimides
β Scribed by M. Saeed Butt; Zareen Akhter; Michael Bolte; Humaira Masood Siddiqi; Haq Nawaz; M. Zafar-uz-Zaman
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 342 KB
- Volume
- 114
- Category
- Article
- ISSN
- 0021-8995
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π SIMILAR VOLUMES
A series of new soluble aromatic polyimides with inherent viscosities of 0.65-1.12 dL/g were synthesized from 1,3-bis(4-aminophenyl)-4,5-diphenylimidazolin-2-one and various aromatic tetracarboxylic dianhydrides by the conventional twostep procedure that included ring-opening polyaddition and subseq
## Abstract Anionic polymerization of Ξ΅βcaprolactam was performed in the presence of only 5 wt % of aromatic polyimides having fiveβ and sixβmembered imide cycles and bearing hexafluoroisopropylidene, ether, fluorene, siloxane, phthalide, or SO~3~Hο£Ώ groups, both in the polymer backbone and as side
The synthesis is described of some aromatic polyamides based on unsubstituted, and methyl-, carboxy-, and sulfo-substituted diamines by interfacial polycondensation. Some of them are crosslinked and some of them contain heterocyclic aromatic rings. Their chemical structures are characterized by IR a