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Organosoluble and Colorless Fluorinated Poly(ether Imide)s from 1,2‐Bis(3,4‐dicarboxyphenoxy)benzene Dianhydride and Trifluoromethyl‐substituted Aromatic Bis(ether Amine)s by Cheng‐Lin Chung; Chin‐Ping Yang; Sheng‐Huei Hsiao is a Materials Science article available to read on EtoBox.

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## Abstract A series of novel aromatic poly(ether imide)s (PEI) containing ortho‐catenated phenylene rings and pendant trifluoromethyl group have been prepared from 1,2‐bis(3,4‐dicarboxyphenoxy)benzene dianhydride (1) with seven trifluoromethyl‐substituted aromatic bis(ether amine)s (**2a‐g**) via a conventional two‐stage process that included ring‐opening polyaddition to form the poly(amic acid)s followed by chemical imidization to the polyimides. These PEIs had inherent viscosities in the range of 0.45–1.17 dL/g that corresponded to weight–average and number–average molecular weights (by gel‐permeation chromatography) of 42,000–102,000 and 28,500–67,500, respectively. All the PEIs were readily soluble in many organic solvents and could be solution‐cast into transparent, flexible, and strong films. These films were essentially colorless; they had a very low yellowness index of 4.34–6.55 and an UV–vis absorption cut‐off wavelength at 361–370 nm. The PEIs exhibited moderate‐to‐high glass‐transition temperatures (__T__~g~) in the range of 185–270 °C, softening temperatures (__T__~s~) in the range of 184–275 °C, and 10% weight loss temperatures higher than 466 °C in nitrogen or in air

Who reads Organosoluble and Colorless Fluorinated Poly(ether Imide)s from 1,2‐Bis(3,4‐dicarboxyphenoxy)benzene Dianhydride and Trifluoromethyl‐substituted Aromatic Bis(ether Amine)s?

Author

Cheng‐Lin Chung; Chin‐Ping Yang; Sheng‐Huei Hsiao

Publisher

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

Published

2006

Language

EN

Field

Materials Science (Physical Sciences)