Preparation of Transparent Polyimides Derived from cis- and trans-Dicyclohexyl-3,3′,4,4′-tetracarboxylic Dianhydrides
✍ Scribed by Akinori Shiotani; Hiroshi Shimazaki; Makoto Matsuo
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 126 KB
- Volume
- 286
- Category
- Article
- ISSN
- 1438-7492
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Four kinds of 3,3 ,4,4-benzophenone tetracarboxylic dianhydride (BTDA) -pyromelliitic dianhydride (PMDA) alternating polyimide (BTDA-PMDA API) were obtained by reacting 1 mol BTDA with 2 mol diamines to form BTDA chainextended diamines (BTDA CED), followed by the addition of 1 mol PMDA to yield the
4,4Ј-Diamino-3,3Ј-dimethyldiphenylmethane was used to prepare polyimides in an attempt to achieve good organo-solubility and light color. Polyimides based on this diamine and three conventional aromatic dianhydrides were prepared by solution polycondensation followed by chemical imidization. They po