Synthesis and characterization of Schiff‐base‐containing polyimides |
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Authors: | Mousa Ghaemy Hossein Mighani |
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Affiliation: | Faculty of Chemistry, Mazandaran University, Babolsar, Iran |
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Abstract: | Benzyl bisthiosemicarbazone and its complexes with nickel (NiLH4) and copper (CuLH4) were used as diamine monomers for the synthesis of new Schiff‐base polyimides. The solution polycondensation of these monomers with the aromatic dianhydrides afforded metal‐containing Schiff‐base polyimides with inherent viscosities of 0.98–1.33 dL/g (measured in N‐methyl‐2‐pyrrolidone at 25°C). The polyimides were generally soluble in a wide range of solvents such as N,N‐dimethylformamide, N,N‐dimethylacetamide, tetrahydrofuran, dimethyl sulfoxide, tetrachloroethane, hexamethylene phosphoramide, N‐methyl‐2‐pyrrolidone, ethyl acetate, and pyridine at room temperature. The initial degradation temperatures of the resultant polyimides fell in the range of 220–350°C in nitrogen with char yields ranging from 36 to 64% at 700°C. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 |
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Keywords: | polycondensation polyimides synthesis thermal properties |
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