Organo-Soluble Fluorinated Polyimides Derived From alpha,alpha-Bis(4-amino-3,5-dimethylphenyl)-4?-fluorophenyl Methane and Various Aromatic Dianhydrides

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World Scientific Publishing
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Overview: Organo-soluble fluorinated polyimides were synthesized by the polycondensation of a new aromatic diamine a, a- bis (4-amino-3, 5-dimethylphenyl)-4?-fluorophenyl methane with several aromatic dianhydrides. The one-step polymerization procedure was conducted at 180_ in m-cresol, producing the polyimides with inherent viscosities of 0.68-0.76 dL g-1. The polyimides could be soluble not only in polar aprotic solvents, such as N-methyl-2-pyrrolidinone, and N, Ndimethylacetamide, but also in common organic solvents, such as chloroform, cyclopentanone, and m-cresol and so on. The polyimide films show excellent transparency with the UV-Vis cut-off lengths of 310-360 nm and light transmittances of higher than 80% in the visible region.

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Format: PDF | Size: 207KB | Date: Dec 2003 | Pages: 7

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