Transport properties of polyimides derived from benzophenonetetracarboxylic dianhydride and other diamines
β Scribed by Yu. N. Lazareva; M. N. Vidyakin; A. Yu. Alentiev; M. Yu. Yablokova; A. A. Kuznetsov; I. A. Ronova
- Book ID
- 110197601
- Publisher
- SP MAIK Nauka/Interperiodica
- Year
- 2009
- Tongue
- English
- Weight
- 215 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0965-545X
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π SIMILAR VOLUMES
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)
Aliphatic polyimides (P-XBTA) having inherent viscosities of 0.4-1.4 dL/ g were readily synthesized by the high-pressure polycondensation of the salt monomers, composed of aliphatic diamines having various methylene chain lengths ( X Γ 4-12) and 3,3,4,4-benzophenonetetracarboxylic acid (BTA), under
2,2,Π3,3Π-Biphenyltetracarboxylic dianhydride (2,2,Π3,3Π-BPDA) was prepared by a coupling reaction of dimethyl 3-iodophthalate. The X-ray single-crystal structure determination showed that this dianhydride had a bent and noncopolanar structure, presenting a striking contrast to its isomer, 3,3,Π4,4Π