Preparation and properties of melt-processable polyimides based on fluorinated aromatic diamines and aromatic dianhydrides
β Scribed by Kai Wang; Lin Fan; Jin-Gang Liu; Mao-Sheng Zhan; Shi-Yong Yang
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 311 KB
- Volume
- 107
- Category
- Article
- ISSN
- 0021-8995
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## Abstract We report a novel method of polyimide (PI) synthesis from prepolymers based on dianhydrides and diacetyl derivatives of aromatic diamines that facilitate the preparation of a melt processable mixture at 300 Β± 10Β°C of the prepolymer and magnetic NdβFeβB alloy to provide PIβbonded magnets
Four series of aromatic polyimides (PIs V-VIII) composed of biphenyltetracarboxylic dianhydrides (BPDAs) and aromatic diamines bearing alkylene spacers were prepared by two methods. Most polymers could be readily prepared in a one-step method for the combination of a-BPDA with β£,-bis(3-aminophenoxy)
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