ABSTRACT
Keywords: Polyimide; bisimide; morphology; supermolecular structure; liquid crystalline structures.
1. INTRODUCTION
Aromatic polyimides (PIs) are extensively used for the development of novel important engineering materials with excellent thermal stability, good chemical resistance, noncombustibility, nonflammability, self-lubricity, low dielectric con-
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stant, and high mechanical properties [1-5]. This advantageous combination of technical characteristics makes it possible to consider some PIs as a promising matrix for advanced fiber-reinforced composites for high temperature applications.
