Synthesis and properties of organosoluble polynaphthalimides bearing ether linkages and phthalide cardo groups

✍ Scribed by Chin-Ping Yang; Ya-Yin Chen; Sheng-Huei Hsiao

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 258 KB
• Volume: 104
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.25553

✦ Synopsis

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‐bis[4‐(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