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Int. J. Mol. Sci. 2009, 10(11), 5031-5053; doi:10.3390/ijms10115031
Article

Dendronized Polyimides Bearing Long-Chain Alkyl Groups and Their Application for Vertically Aligned Nematic Liquid Crystal Displays

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Received: 7 September 2009; in revised form: 11 November 2009 / Accepted: 18 November 2009 / Published: 19 November 2009
(This article belongs to the Special Issue Liquid Crystals)
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Abstract: Polyimides having dendritic side chains were investigated. The terphenylene diamine monomer having a first-generation monodendron, 3,4,5-tris(n-dodecyloxy)-benzoate and the monomer having a second-generation monodendron, 3,4,5-tris[-3’,4’,5’-tri(n-dodecyloxy)benzyloxy]benzoate were successfully synthesized and the corresponding soluble dendritic polyimides were obtained by polycondensation with conventional tetracarboxylic dianhydride monomers such as benzophenone tertracarboxylic dianhydride (BTDA). The two-step polymerizations in NMP that is a general method for the synthesis of soluble polyimides is difficult; however, the expected dendritic polyimides can be obtained in aromatic polar solvents such as m-cresol and pyridine. The solubility of these dendoronized polyimides is characteristic; soluble in common organic solvents such as dichloromethane, chloroform, toluene and THF. These dendronized polyimides exhibited high glass transition temperatures and good thermal stability in both air and under nitrogen. Their application as alignment layers for LCDs was investigated, and it was found that these polyimides having dendritic side chains were applicable for the vertically aligned nematic liquid crystal displays (VAN-LCDs).
Keywords: polyimide; soluble polyimide; long-chain alkyl group; dendronized polyimide; alignment layers; vertically aligned nematic liquid crystal displays polyimide; soluble polyimide; long-chain alkyl group; dendronized polyimide; alignment layers; vertically aligned nematic liquid crystal displays
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Tsuda, Y.; OH, J.M.; Kuwahara, R. Dendronized Polyimides Bearing Long-Chain Alkyl Groups and Their Application for Vertically Aligned Nematic Liquid Crystal Displays. Int. J. Mol. Sci. 2009, 10, 5031-5053.

AMA Style

Tsuda Y, OH JM, Kuwahara R. Dendronized Polyimides Bearing Long-Chain Alkyl Groups and Their Application for Vertically Aligned Nematic Liquid Crystal Displays. International Journal of Molecular Sciences. 2009; 10(11):5031-5053.

Chicago/Turabian Style

Tsuda, Yusuke; OH, Jae Min; Kuwahara, Renpei. 2009. "Dendronized Polyimides Bearing Long-Chain Alkyl Groups and Their Application for Vertically Aligned Nematic Liquid Crystal Displays." Int. J. Mol. Sci. 10, no. 11: 5031-5053.


Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert