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Successful Synthesis of a 1 : 1 Salt Monomer Derived from Bis(4-aminophenyl) Ether and Pyromellitic Acid for Direct Polycondensation to an Aromatic Polyimide by Yoshio Imai; Takafumi Fueki; Tatsuo Inoue; Masa-Aki Kakimoto is a Materials Science article available to read on EtoBox.

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## Introduction During the course of these studies, we have found that bis(4-aminophenyl) ether, a weakly basic aromatic diamine, together with tetrafunctional pyromel-Aromatic polyimides have been well-known since the litic acid, could form readily the salt monomer with 1 : early 1960s as the most useful superengineering plas-1 composition regardless of their 2 : 4 functionality. tics because of their high thermal stability, good chemi-This article deals with a successful synthesis of the 1 : cal resistance, and excellent mechanical properties and 1 salt monomer derived from bis(4-aminophenyl) ether are used widely in aerospace, electronics, and other inand pyromellitic acid and the subsequent solid-state dustries. [1][2][3][4] Aromatic polyimides are generally prethermal polycondensation leading to the direct rapid pared in two steps by the ring-opening polyaddition of formation of the aromatic polyimide (Scheme 1). aromatic diamines to aromatic tetracarboxylic dianhydrides yielding soluble polyamic acids, followed by thermal cyclodehydration to insoluble polyimides. [1][2][3][4] Prior to the aromatic polyimide preparation, aliphatic-aro-EXPERIMENTAL matic polyimides were synthes

Who reads Successful Synthesis of a 1 : 1 Salt Monomer Derived from Bis(4-aminophenyl) Ether and Pyromellitic Acid for Direct Polycondensation to an Aromatic Polyimide?

Author

Yoshio Imai; Takafumi Fueki; Tatsuo Inoue; Masa-Aki Kakimoto

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0887-624X)

Published

1998

Language

EN

Field

Materials Science (Physical Sciences)