| ORGANO-SOLUBLE FLUORINATED POLYIMIDES DERIVED FROM a,a-BIS(4-AMINO-3,5- DIMETHYLPHENYL)-4′-FLUOROPHENYL METHANE AND VARIOUS AROMATIC DIANHYDRIDES |
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| 摘 要： | Organo-soluble fluorinated polyimides were synthesized by the polycondensation of a new aromatic diamine -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 0.680.76 dL•g1. The polyimides could be soluble not only in polar aprotic solvents, such as N-methyl-2-pyrrolidinone, and N,N-dimethylacetamide, but also in common organic solvents, such as chloroform, cyclopentanone, m-cresol and so on. The polyimide films show excellent transparency with the UV-Vis cut-off lengths of 310360 nm and light transmittances of higher than 80% in the visible region. In addition, the polyimides exhibit good thermal stability with an initial decomposition temperature (Td) higher than 530℃ and have more than 60% of residual weight retentions at 700℃.
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| 关 键 词： | 氟化聚酰亚胺 有机溶剂 α α-二（4-氨基-3 5-二甲基苯）-4＇-氟代苯甲烷 溶解性 热稳定性 光透过率 |
| 收稿时间： | 2003-10-23 |
| 修稿时间： | 2003-12-03 |
ORGANO-SOLUBLE FLUORINATED POLYIMIDES DERIVED FROM a,a-BIS(4-AMINO-3,5- DIMETHYLPHENYL)-4′-FLUOROPHENYL METHANE AND VARIOUS AROMATIC DIANHYDRIDES |
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| Authors: | Jin-gang Liu Yang-xi Peng Hong-shen Li Lin Fan Shi-yong Yang |
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| Institution: | Laboratory of Advanced Polymer Materials, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | Organo-soluble fluorinated polyimides were synthesized by the polycondensation of a new aromatic diamine -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 0.680.76 dL•g1. The polyimides could be soluble not only in polar aprotic solvents, such as N-methyl-2-pyrrolidinone, and N,N-dimethylacetamide, but also in common organic solvents, such as chloroform, cyclopentanone, m-cresol and so on. The polyimide films show excellent transparency with the UV-Vis cut-off lengths of 310360 nm and light transmittances of higher than 80% in the visible region. In addition, the polyimides exhibit good thermal stability with an initial decomposition temperature (Td) higher than 530℃ and have more than 60% of residual weight retentions at 700℃. |
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| Keywords: | Fluorinated polyimides Solubility Thermal stability Optical transparency |
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