Synthesis and characterization of polyimides based on novel isomeric perfluorinated naphthylenediamines |
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| Authors: | Inna K Shundrina Soltan Z Kusov Elena V Karpova Yulia V Gerasimova |
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| Institution: | a N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Lavrentiev Avenue 9, 630090 Novosibirsk, Russian Federation
b Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Lavrentiev Avenue 8, 630090 Novosibirsk, Russian Federation |
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| Abstract: | Novel highly fluorinated polyimides containing hexafluoronaphthylene fragment in the main chain were prepared by the two-stage polymerization of 2,7- and 2,6-diaminohexafluoronaphthalenes with 4,4′-oxydiphthalic anhydride: polycondensation in a solution at 80 °C followed by high-temperature solid-state chain extension. The influence of hexafluoronaphthylene fragment isomerism on the key polyimide features - molecular weight, thermal stability, solubility, optical properties - was characterized. Polyimides based on 2,7-diaminohexafluoronaphthalene or easily accessible mixture of isomeric diamines formed the flexible, transparent, and thermostable films. |
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| Keywords: | Fluorinated polyimides Polyimide properties Diaminohexafluoronaphthalenes MALDI-TOF MS |
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