Synthesis and properties of organosoluble polynaphthalimides bearing ether linkages and phthalide cardo groups |
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| Authors: | Chin‐Ping Yang Ya‐Yin Chen Sheng‐Huei Hsiao |
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| Affiliation: | 1. Department of Chemical Engineering, Tatung University, Taipei 104, Taiwan, Republic of China;2. This author died on August 17, 2005, at the age of 75. This article is now dedicated to the memory of Prof. Chin‐Ping Yang, who cherished research and publications as his lifetime joys. |
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| Abstract: | A series of organic‐soluble polynaphthalimides (PNI) bearing flexible ether links and phthalide cardo group were synthesized from 1,4,5,8‐naphthalenetetracarboxylic dianhydride (NTDA) with 3,3‐bis4‐(4‐aminophenoxy)‐3‐methylphenyl]phthalide (BAMP) and its equimolar mixtures with other dietheramines by high‐temperature solution polycondensation in m‐cresol. The PNIs had moderate to high inherent viscosities in the range of 1.24–2.25 dL/g and could afford flexible and tough films with tensile strengths of 97–138 MPa by casting their m‐cresol solutions. These PNIs exhibited high thermal stability, with glass transition temperature of 291°C–321°C, 10% weight‐loss temperatures above 542°C, and char yields at 800°C in nitrogen higher than 56%. In comparison with PNIs without the BAMP component, these BAMP‐modified PNIs revealed an enhanced solubility and film‐forming capability. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 1104–1109, 2007 |
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| Keywords: | 1 4 5 8‐naphthalenetetracarboxylic dianhydride polynaphthalimides polyimides phthalide organosoluble tough films |
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